diff --git a/android/device/generated/help.h b/android/device/generated/help.h
index 5bbe5ca..45ce29f 100644
--- a/android/device/generated/help.h
+++ b/android/device/generated/help.h
@@ -456,7 +456,7 @@
 
 #define HELP_arp "usage: arp\n[-vn] [-H HWTYPE] [-i IF] -a [HOSTNAME]\n[-v]              [-i IF] -d HOSTNAME [pub]\n[-v]  [-H HWTYPE] [-i IF] -s HOSTNAME HWADDR [temp]\n[-v]  [-H HWTYPE] [-i IF] -s HOSTNAME HWADDR [netmask MASK] pub\n[-v]  [-H HWTYPE] [-i IF] -Ds HOSTNAME IFACE [netmask MASK] pub\n\nManipulate ARP cache\n\n-a    Display (all) hosts\n-s    Set new ARP entry\n-d    Delete a specified entry\n-v    Verbose\n-n    Don't resolve names\n-i IF Network interface\n-D    Read <hwaddr> from given device\n-A,-p AF  Protocol family\n-H    HWTYPE Hardware address type"
 
-#define HELP_xargs "usage: xargs [-0prt] [-snE STR] COMMAND...\n\nRun command line one or more times, appending arguments from stdin.\n\nIf COMMAND exits with 255, don't launch another even if arguments remain.\n\n-0	Each argument is NULL terminated, no whitespace or quote processing\n-E	Stop at line matching string\n-n	Max number of arguments per command\n-o	Open tty for COMMAND's stdin (default /dev/null)\n-p	Prompt for y/n from tty before running each command\n-P  Parallel processes (default 1)\n-r	Don't run with empty input (otherwise always run command once)\n-s	Size in bytes per command line\n-t	Trace, print command line to stderr"
+#define HELP_xargs "usage: xargs [-0prt] [-snE STR] COMMAND...\n\nRun command line one or more times, appending arguments from stdin.\n\nIf COMMAND exits with 255, don't launch another even if arguments remain.\n\n-0	Each argument is NULL terminated, no whitespace or quote processing\n-E	Stop at line matching string\n-n	Max number of arguments per command\n-o	Open tty for COMMAND's stdin (default /dev/null)\n-p	Prompt for y/n from tty before running each command\n-P	Parallel processes (default 1)\n-r	Don't run with empty input (otherwise always run command once)\n-s	Size in bytes per command line\n-t	Trace, print command line to stderr"
 
 #define HELP_who "usage: who\n\nPrint information about logged in users."
 
@@ -586,7 +586,7 @@
 
 #define HELP_df "usage: df [-HPkhi] [-t type] [FILE...]\n\nThe \"disk free\" command shows total/used/available disk space for\neach filesystem listed on the command line, or all currently mounted\nfilesystems.\n\n-a	Show all (including /proc and friends)\n-P	The SUSv3 \"Pedantic\" option\n-k	Sets units back to 1024 bytes (the default without -P)\n-h	Human readable (K=1024)\n-H	Human readable (k=1000)\n-i	Show inodes instead of blocks\n-t type	Display only filesystems of this type\n\nPedantic provides a slightly less useful output format dictated by Posix,\nand sets the units to 512 bytes instead of the default 1024 bytes."
 
-#define HELP_date "usage: date [-u] [-r FILE] [-d DATE] [+DISPLAY_FORMAT] [-D SET_FORMAT] [SET]\n\nSet/get the current date/time. With no SET shows the current date.\n\n-d	Show DATE instead of current time (convert date format)\n-D	+FORMAT for SET or -d (instead of MMDDhhmm[[CC]YY][.ss])\n-r	Use modification time of FILE instead of current date\n-u	Use UTC instead of current timezone\n\nSupported input formats:\n\nMMDDhhmm[[CC]YY][.ss]     POSIX\n@UNIXTIME[.FRACTION]      seconds since midnight 1970-01-01\nYYYY-MM-DD [hh:mm[:ss]]   ISO 8601\nhh:mm[:ss]                24-hour time today\n\nAll input formats can be preceded by TZ=\"id\" to set the input time zone\nseparately from the output time zone. Otherwise $TZ sets both.\n\n+FORMAT specifies display format string using strftime(3) syntax:\n\n%% literal %             %n newline              %t tab\n%S seconds (00-60)       %M minute (00-59)       %m month (01-12)\n%H hour (0-23)           %I hour (01-12)         %p AM/PM\n%y short year (00-99)    %Y year                 %C century\n%a short weekday name    %A weekday name         %u day of week (1-7, 1=mon)\n%b short month name      %B month name           %Z timezone name\n%j day of year (001-366) %d day of month (01-31) %e day of month ( 1-31)\n%N nanosec (output only)\n\n%U Week of year (0-53 start Sunday)   %W Week of year (0-53 start Monday)\n%V Week of year (1-53 start Monday, week < 4 days not part of this year)\n\n%F \"%Y-%m-%d\"     %R \"%H:%M\"        %T \"%H:%M:%S\"    %z numeric timezone\n%D \"%m/%d/%y\"     %r \"%I:%M:%S %p\"  %h \"%b\"          %s unix epoch time\n%x locale date    %X locale time    %c locale date/time"
+#define HELP_date "usage: date [-u] [-r FILE] [-d DATE] [+DISPLAY_FORMAT] [-D SET_FORMAT] [SET]\n\nSet/get the current date/time. With no SET shows the current date.\n\n-d	Show DATE instead of current time (convert date format)\n-D	+FORMAT for SET or -d (instead of MMDDhhmm[[CC]YY][.ss])\n-r	Use modification time of FILE instead of current date\n-u	Use UTC instead of current timezone\n\nSupported input formats:\n\nMMDDhhmm[[CC]YY][.ss]     POSIX\n@UNIXTIME[.FRACTION]      seconds since midnight 1970-01-01\nYYYY-MM-DD [hh:mm[:ss]]   ISO 8601\nhh:mm[:ss]                24-hour time today\n\nAll input formats can be followed by fractional seconds, and/or a UTC\noffset such as -0800.\n\nAll input formats can be preceded by TZ=\"id\" to set the input time zone\nseparately from the output time zone. Otherwise $TZ sets both.\n\n+FORMAT specifies display format string using strftime(3) syntax:\n\n%% literal %             %n newline              %t tab\n%S seconds (00-60)       %M minute (00-59)       %m month (01-12)\n%H hour (0-23)           %I hour (01-12)         %p AM/PM\n%y short year (00-99)    %Y year                 %C century\n%a short weekday name    %A weekday name         %u day of week (1-7, 1=mon)\n%b short month name      %B month name           %Z timezone name\n%j day of year (001-366) %d day of month (01-31) %e day of month ( 1-31)\n%N nanosec (output only)\n\n%U Week of year (0-53 start Sunday)   %W Week of year (0-53 start Monday)\n%V Week of year (1-53 start Monday, week < 4 days not part of this year)\n\n%F \"%Y-%m-%d\"     %R \"%H:%M\"        %T \"%H:%M:%S\"    %z numeric timezone\n%D \"%m/%d/%y\"     %r \"%I:%M:%S %p\"  %h \"%b\"          %s unix epoch time\n%x locale date    %X locale time    %c locale date/time"
 
 #define HELP_cut "usage: cut [-Ds] [-bcfF LIST] [-dO DELIM] [FILE...]\n\nPrint selected parts of lines from each FILE to standard output.\n\nEach selection LIST is comma separated, either numbers (counting from 1)\nor dash separated ranges (inclusive, with X- meaning to end of line and -X\nfrom start). By default selection ranges are sorted and collated, use -D\nto prevent that.\n\n-b	Select bytes\n-c	Select UTF-8 characters\n-C	Select unicode columns\n-d	Use DELIM (default is TAB for -f, run of whitespace for -F)\n-D	Don't sort/collate selections or match -fF lines without delimiter\n-f	Select fields (words) separated by single DELIM character\n-F	Select fields separated by DELIM regex\n-O	Output delimiter (default one space for -F, input delim for -f)\n-s	Skip lines without delimiters"
 
diff --git a/android/linux/generated/help.h b/android/linux/generated/help.h
index 82c7688..67fc481 100644
--- a/android/linux/generated/help.h
+++ b/android/linux/generated/help.h
@@ -458,7 +458,7 @@
 
 #define HELP_arp "usage: arp\n[-vn] [-H HWTYPE] [-i IF] -a [HOSTNAME]\n[-v]              [-i IF] -d HOSTNAME [pub]\n[-v]  [-H HWTYPE] [-i IF] -s HOSTNAME HWADDR [temp]\n[-v]  [-H HWTYPE] [-i IF] -s HOSTNAME HWADDR [netmask MASK] pub\n[-v]  [-H HWTYPE] [-i IF] -Ds HOSTNAME IFACE [netmask MASK] pub\n\nManipulate ARP cache\n\n-a    Display (all) hosts\n-s    Set new ARP entry\n-d    Delete a specified entry\n-v    Verbose\n-n    Don't resolve names\n-i IF Network interface\n-D    Read <hwaddr> from given device\n-A,-p AF  Protocol family\n-H    HWTYPE Hardware address type"
 
-#define HELP_xargs "usage: xargs [-0prt] [-snE STR] COMMAND...\n\nRun command line one or more times, appending arguments from stdin.\n\nIf COMMAND exits with 255, don't launch another even if arguments remain.\n\n-0	Each argument is NULL terminated, no whitespace or quote processing\n-E	Stop at line matching string\n-n	Max number of arguments per command\n-o	Open tty for COMMAND's stdin (default /dev/null)\n-p	Prompt for y/n from tty before running each command\n-P  Parallel processes (default 1)\n-r	Don't run with empty input (otherwise always run command once)\n-s	Size in bytes per command line\n-t	Trace, print command line to stderr"
+#define HELP_xargs "usage: xargs [-0prt] [-snE STR] COMMAND...\n\nRun command line one or more times, appending arguments from stdin.\n\nIf COMMAND exits with 255, don't launch another even if arguments remain.\n\n-0	Each argument is NULL terminated, no whitespace or quote processing\n-E	Stop at line matching string\n-n	Max number of arguments per command\n-o	Open tty for COMMAND's stdin (default /dev/null)\n-p	Prompt for y/n from tty before running each command\n-P	Parallel processes (default 1)\n-r	Don't run with empty input (otherwise always run command once)\n-s	Size in bytes per command line\n-t	Trace, print command line to stderr"
 
 #define HELP_who "usage: who\n\nPrint information about logged in users."
 
@@ -592,7 +592,7 @@
 
 #define HELP_df "usage: df [-HPkhi] [-t type] [FILE...]\n\nThe \"disk free\" command shows total/used/available disk space for\neach filesystem listed on the command line, or all currently mounted\nfilesystems.\n\n-a	Show all (including /proc and friends)\n-P	The SUSv3 \"Pedantic\" option\n-k	Sets units back to 1024 bytes (the default without -P)\n-h	Human readable (K=1024)\n-H	Human readable (k=1000)\n-i	Show inodes instead of blocks\n-t type	Display only filesystems of this type\n\nPedantic provides a slightly less useful output format dictated by Posix,\nand sets the units to 512 bytes instead of the default 1024 bytes."
 
-#define HELP_date "usage: date [-u] [-r FILE] [-d DATE] [+DISPLAY_FORMAT] [-D SET_FORMAT] [SET]\n\nSet/get the current date/time. With no SET shows the current date.\n\n-d	Show DATE instead of current time (convert date format)\n-D	+FORMAT for SET or -d (instead of MMDDhhmm[[CC]YY][.ss])\n-r	Use modification time of FILE instead of current date\n-u	Use UTC instead of current timezone\n\nSupported input formats:\n\nMMDDhhmm[[CC]YY][.ss]     POSIX\n@UNIXTIME[.FRACTION]      seconds since midnight 1970-01-01\nYYYY-MM-DD [hh:mm[:ss]]   ISO 8601\nhh:mm[:ss]                24-hour time today\n\nAll input formats can be preceded by TZ=\"id\" to set the input time zone\nseparately from the output time zone. Otherwise $TZ sets both.\n\n+FORMAT specifies display format string using strftime(3) syntax:\n\n%% literal %             %n newline              %t tab\n%S seconds (00-60)       %M minute (00-59)       %m month (01-12)\n%H hour (0-23)           %I hour (01-12)         %p AM/PM\n%y short year (00-99)    %Y year                 %C century\n%a short weekday name    %A weekday name         %u day of week (1-7, 1=mon)\n%b short month name      %B month name           %Z timezone name\n%j day of year (001-366) %d day of month (01-31) %e day of month ( 1-31)\n%N nanosec (output only)\n\n%U Week of year (0-53 start Sunday)   %W Week of year (0-53 start Monday)\n%V Week of year (1-53 start Monday, week < 4 days not part of this year)\n\n%F \"%Y-%m-%d\"     %R \"%H:%M\"        %T \"%H:%M:%S\"    %z numeric timezone\n%D \"%m/%d/%y\"     %r \"%I:%M:%S %p\"  %h \"%b\"          %s unix epoch time\n%x locale date    %X locale time    %c locale date/time"
+#define HELP_date "usage: date [-u] [-r FILE] [-d DATE] [+DISPLAY_FORMAT] [-D SET_FORMAT] [SET]\n\nSet/get the current date/time. With no SET shows the current date.\n\n-d	Show DATE instead of current time (convert date format)\n-D	+FORMAT for SET or -d (instead of MMDDhhmm[[CC]YY][.ss])\n-r	Use modification time of FILE instead of current date\n-u	Use UTC instead of current timezone\n\nSupported input formats:\n\nMMDDhhmm[[CC]YY][.ss]     POSIX\n@UNIXTIME[.FRACTION]      seconds since midnight 1970-01-01\nYYYY-MM-DD [hh:mm[:ss]]   ISO 8601\nhh:mm[:ss]                24-hour time today\n\nAll input formats can be followed by fractional seconds, and/or a UTC\noffset such as -0800.\n\nAll input formats can be preceded by TZ=\"id\" to set the input time zone\nseparately from the output time zone. Otherwise $TZ sets both.\n\n+FORMAT specifies display format string using strftime(3) syntax:\n\n%% literal %             %n newline              %t tab\n%S seconds (00-60)       %M minute (00-59)       %m month (01-12)\n%H hour (0-23)           %I hour (01-12)         %p AM/PM\n%y short year (00-99)    %Y year                 %C century\n%a short weekday name    %A weekday name         %u day of week (1-7, 1=mon)\n%b short month name      %B month name           %Z timezone name\n%j day of year (001-366) %d day of month (01-31) %e day of month ( 1-31)\n%N nanosec (output only)\n\n%U Week of year (0-53 start Sunday)   %W Week of year (0-53 start Monday)\n%V Week of year (1-53 start Monday, week < 4 days not part of this year)\n\n%F \"%Y-%m-%d\"     %R \"%H:%M\"        %T \"%H:%M:%S\"    %z numeric timezone\n%D \"%m/%d/%y\"     %r \"%I:%M:%S %p\"  %h \"%b\"          %s unix epoch time\n%x locale date    %X locale time    %c locale date/time"
 
 #define HELP_cut "usage: cut [-Ds] [-bcfF LIST] [-dO DELIM] [FILE...]\n\nPrint selected parts of lines from each FILE to standard output.\n\nEach selection LIST is comma separated, either numbers (counting from 1)\nor dash separated ranges (inclusive, with X- meaning to end of line and -X\nfrom start). By default selection ranges are sorted and collated, use -D\nto prevent that.\n\n-b	Select bytes\n-c	Select UTF-8 characters\n-C	Select unicode columns\n-d	Use DELIM (default is TAB for -f, run of whitespace for -F)\n-D	Don't sort/collate selections or match -fF lines without delimiter\n-f	Select fields (words) separated by single DELIM character\n-F	Select fields separated by DELIM regex\n-O	Output delimiter (default one space for -F, input delim for -f)\n-s	Skip lines without delimiters"
 
diff --git a/android/mac/generated/help.h b/android/mac/generated/help.h
index 82c7688..67fc481 100644
--- a/android/mac/generated/help.h
+++ b/android/mac/generated/help.h
@@ -458,7 +458,7 @@
 
 #define HELP_arp "usage: arp\n[-vn] [-H HWTYPE] [-i IF] -a [HOSTNAME]\n[-v]              [-i IF] -d HOSTNAME [pub]\n[-v]  [-H HWTYPE] [-i IF] -s HOSTNAME HWADDR [temp]\n[-v]  [-H HWTYPE] [-i IF] -s HOSTNAME HWADDR [netmask MASK] pub\n[-v]  [-H HWTYPE] [-i IF] -Ds HOSTNAME IFACE [netmask MASK] pub\n\nManipulate ARP cache\n\n-a    Display (all) hosts\n-s    Set new ARP entry\n-d    Delete a specified entry\n-v    Verbose\n-n    Don't resolve names\n-i IF Network interface\n-D    Read <hwaddr> from given device\n-A,-p AF  Protocol family\n-H    HWTYPE Hardware address type"
 
-#define HELP_xargs "usage: xargs [-0prt] [-snE STR] COMMAND...\n\nRun command line one or more times, appending arguments from stdin.\n\nIf COMMAND exits with 255, don't launch another even if arguments remain.\n\n-0	Each argument is NULL terminated, no whitespace or quote processing\n-E	Stop at line matching string\n-n	Max number of arguments per command\n-o	Open tty for COMMAND's stdin (default /dev/null)\n-p	Prompt for y/n from tty before running each command\n-P  Parallel processes (default 1)\n-r	Don't run with empty input (otherwise always run command once)\n-s	Size in bytes per command line\n-t	Trace, print command line to stderr"
+#define HELP_xargs "usage: xargs [-0prt] [-snE STR] COMMAND...\n\nRun command line one or more times, appending arguments from stdin.\n\nIf COMMAND exits with 255, don't launch another even if arguments remain.\n\n-0	Each argument is NULL terminated, no whitespace or quote processing\n-E	Stop at line matching string\n-n	Max number of arguments per command\n-o	Open tty for COMMAND's stdin (default /dev/null)\n-p	Prompt for y/n from tty before running each command\n-P	Parallel processes (default 1)\n-r	Don't run with empty input (otherwise always run command once)\n-s	Size in bytes per command line\n-t	Trace, print command line to stderr"
 
 #define HELP_who "usage: who\n\nPrint information about logged in users."
 
@@ -592,7 +592,7 @@
 
 #define HELP_df "usage: df [-HPkhi] [-t type] [FILE...]\n\nThe \"disk free\" command shows total/used/available disk space for\neach filesystem listed on the command line, or all currently mounted\nfilesystems.\n\n-a	Show all (including /proc and friends)\n-P	The SUSv3 \"Pedantic\" option\n-k	Sets units back to 1024 bytes (the default without -P)\n-h	Human readable (K=1024)\n-H	Human readable (k=1000)\n-i	Show inodes instead of blocks\n-t type	Display only filesystems of this type\n\nPedantic provides a slightly less useful output format dictated by Posix,\nand sets the units to 512 bytes instead of the default 1024 bytes."
 
-#define HELP_date "usage: date [-u] [-r FILE] [-d DATE] [+DISPLAY_FORMAT] [-D SET_FORMAT] [SET]\n\nSet/get the current date/time. With no SET shows the current date.\n\n-d	Show DATE instead of current time (convert date format)\n-D	+FORMAT for SET or -d (instead of MMDDhhmm[[CC]YY][.ss])\n-r	Use modification time of FILE instead of current date\n-u	Use UTC instead of current timezone\n\nSupported input formats:\n\nMMDDhhmm[[CC]YY][.ss]     POSIX\n@UNIXTIME[.FRACTION]      seconds since midnight 1970-01-01\nYYYY-MM-DD [hh:mm[:ss]]   ISO 8601\nhh:mm[:ss]                24-hour time today\n\nAll input formats can be preceded by TZ=\"id\" to set the input time zone\nseparately from the output time zone. Otherwise $TZ sets both.\n\n+FORMAT specifies display format string using strftime(3) syntax:\n\n%% literal %             %n newline              %t tab\n%S seconds (00-60)       %M minute (00-59)       %m month (01-12)\n%H hour (0-23)           %I hour (01-12)         %p AM/PM\n%y short year (00-99)    %Y year                 %C century\n%a short weekday name    %A weekday name         %u day of week (1-7, 1=mon)\n%b short month name      %B month name           %Z timezone name\n%j day of year (001-366) %d day of month (01-31) %e day of month ( 1-31)\n%N nanosec (output only)\n\n%U Week of year (0-53 start Sunday)   %W Week of year (0-53 start Monday)\n%V Week of year (1-53 start Monday, week < 4 days not part of this year)\n\n%F \"%Y-%m-%d\"     %R \"%H:%M\"        %T \"%H:%M:%S\"    %z numeric timezone\n%D \"%m/%d/%y\"     %r \"%I:%M:%S %p\"  %h \"%b\"          %s unix epoch time\n%x locale date    %X locale time    %c locale date/time"
+#define HELP_date "usage: date [-u] [-r FILE] [-d DATE] [+DISPLAY_FORMAT] [-D SET_FORMAT] [SET]\n\nSet/get the current date/time. With no SET shows the current date.\n\n-d	Show DATE instead of current time (convert date format)\n-D	+FORMAT for SET or -d (instead of MMDDhhmm[[CC]YY][.ss])\n-r	Use modification time of FILE instead of current date\n-u	Use UTC instead of current timezone\n\nSupported input formats:\n\nMMDDhhmm[[CC]YY][.ss]     POSIX\n@UNIXTIME[.FRACTION]      seconds since midnight 1970-01-01\nYYYY-MM-DD [hh:mm[:ss]]   ISO 8601\nhh:mm[:ss]                24-hour time today\n\nAll input formats can be followed by fractional seconds, and/or a UTC\noffset such as -0800.\n\nAll input formats can be preceded by TZ=\"id\" to set the input time zone\nseparately from the output time zone. Otherwise $TZ sets both.\n\n+FORMAT specifies display format string using strftime(3) syntax:\n\n%% literal %             %n newline              %t tab\n%S seconds (00-60)       %M minute (00-59)       %m month (01-12)\n%H hour (0-23)           %I hour (01-12)         %p AM/PM\n%y short year (00-99)    %Y year                 %C century\n%a short weekday name    %A weekday name         %u day of week (1-7, 1=mon)\n%b short month name      %B month name           %Z timezone name\n%j day of year (001-366) %d day of month (01-31) %e day of month ( 1-31)\n%N nanosec (output only)\n\n%U Week of year (0-53 start Sunday)   %W Week of year (0-53 start Monday)\n%V Week of year (1-53 start Monday, week < 4 days not part of this year)\n\n%F \"%Y-%m-%d\"     %R \"%H:%M\"        %T \"%H:%M:%S\"    %z numeric timezone\n%D \"%m/%d/%y\"     %r \"%I:%M:%S %p\"  %h \"%b\"          %s unix epoch time\n%x locale date    %X locale time    %c locale date/time"
 
 #define HELP_cut "usage: cut [-Ds] [-bcfF LIST] [-dO DELIM] [FILE...]\n\nPrint selected parts of lines from each FILE to standard output.\n\nEach selection LIST is comma separated, either numbers (counting from 1)\nor dash separated ranges (inclusive, with X- meaning to end of line and -X\nfrom start). By default selection ranges are sorted and collated, use -D\nto prevent that.\n\n-b	Select bytes\n-c	Select UTF-8 characters\n-C	Select unicode columns\n-d	Use DELIM (default is TAB for -f, run of whitespace for -F)\n-D	Don't sort/collate selections or match -fF lines without delimiter\n-f	Select fields (words) separated by single DELIM character\n-F	Select fields separated by DELIM regex\n-O	Output delimiter (default one space for -F, input delim for -f)\n-s	Skip lines without delimiters"
 
diff --git a/lib/lib.c b/lib/lib.c
index 930f66e..03529a2 100644
--- a/lib/lib.c
+++ b/lib/lib.c
@@ -445,7 +445,7 @@
   if (**c == 'c') return 31&*(++*c);
   for (i = 0; i<4; i++) {
     if (sscanf(*c, (char *[]){"0%3o%n"+!echo, "x%2x%n", "u%4x%n", "U%6x%n"}[i],
-        &idx, &off))
+        &idx, &off) > 0)
     {
       *c += off;
 
diff --git a/lib/xwrap.c b/lib/xwrap.c
index b144b2f..27473cf 100644
--- a/lib/xwrap.c
+++ b/lib/xwrap.c
@@ -998,15 +998,6 @@
     xvali_date(0, str);
   }
 
-  // Trailing Z means UTC timezone, don't expect libc to know this.
-  // (Trimming it off here means it won't show up in error messages.)
-  if ((i = strlen(str)) && toupper(str[i-1])=='Z') {
-    str[--i] = 0;
-    oldtz = getenv("TZ");
-    if (oldtz) oldtz = xstrdup(oldtz);
-    setenv("TZ", "UTC0", 1);
-  }
-
   // Try each format
   for (i = 0; i<ARRAY_LEN(formats); i++) {
     localtime_r(&now, &tm);
@@ -1014,6 +1005,7 @@
     tm.tm_isdst = -endian;
 
     if ((p = strptime(s, formats[i], &tm))) {
+      // Handle optional fractional seconds.
       if (*p == '.') {
         p++;
         // If format didn't already specify seconds, grab seconds
@@ -1029,6 +1021,27 @@
         }
       }
 
+      // Handle optional Z or +HH[[:]MM] timezone
+      if (*p && strchr("Z+-", *p)) {
+        unsigned hh, mm = 0, len;
+        char *tz, sign = *p++;
+
+        if (sign == 'Z') tz = "UTC0";
+        else if (sscanf(p, "%2u%2u%n",  &hh, &mm, &len) == 2
+              || sscanf(p, "%2u%n:%2u%n", &hh, &len, &mm, &len) > 0)
+        {
+          // flip sign because POSIX UTC offsets are backwards
+          sprintf(tz = libbuf, "UTC%c%02d:%02d", "+-"[sign=='+'], hh, mm);
+          p += len;
+        } else continue;
+
+        if (!oldtz) {
+          oldtz = getenv("TZ");
+          if (oldtz) oldtz = xstrdup(oldtz);
+        }
+        setenv("TZ", tz, 1);
+      }
+
       if (!*p) break;
     }
   }
@@ -1048,7 +1061,7 @@
 
   errno = 0;
   if (1>(ll = getline(&new, &linelen, fp))) {
-    if (errno) perror_msg("getline");
+    if (errno && errno != EINTR) perror_msg("getline");
     new = 0;
   } else if (new[ll-1] == '\n') new[--ll] = 0;
   if (len) *len = ll;
diff --git a/tests/date.test b/tests/date.test
index 2b86534..5cb9f03 100644
--- a/tests/date.test
+++ b/tests/date.test
@@ -9,6 +9,9 @@
 tz=Europe/Berlin
 this_year=$(TZ=$tz date +%Y)
 
+# Use a consistent locale too.
+export LANG=C
+
 # Unix date parsing.
 testing "-d @0" "TZ=$tz date -d @0" "Thu Jan  1 01:00:00 CET 1970\n" "" ""
 testing "-d @0x123 invalid" "TZ=$tz date -d @0x123 2>/dev/null || echo expected error" "expected error\n" "" ""
@@ -54,3 +57,10 @@
 testing "TZ=" "TZ='America/Los_Angeles' date -d 'TZ=\"Europe/Berlin\" 2018-01-04 08:00'" "Wed Jan  3 23:00:00 PST 2018\n" "" ""
 testing "TZ=" "TZ='America/Los_Angeles' date -d 'TZ=\"Europe/Berlin\" 2018-10-04 08:00'" "Wed Oct  3 23:00:00 PDT 2018\n" "" ""
 testing "TZ= @" "TZ='America/Los_Angeles' date -d 'TZ=\"GMT\" @1533427200'" "Sat Aug  4 17:00:00 PDT 2018\n" "" ""
+
+testing "tz Z" \
+  "date -u -d 2020-08-01T12:34:56Z" "Sat Aug  1 12:34:56 UTC 2020\n" "" ""
+testing "tz +0800" \
+  "date -u -d 2020-08-01T12:34:56+0800" "Sat Aug  1 04:34:56 UTC 2020\n" "" ""
+testing "tz +08:00" \
+  "date -u -d 2020-08-01T12:34:56+08:00" "Sat Aug  1 04:34:56 UTC 2020\n" "" ""
diff --git a/tests/echo.test b/tests/echo.test
index 012692e..bd2c3ff 100755
--- a/tests/echo.test
+++ b/tests/echo.test
@@ -49,3 +49,5 @@
 # This is how bash's built-in echo behaves, but now how /bin/echo behaves.
 toyonly testcmd "" "-e 'a\x123\ufb3bbc' | od -An -tx1" \
   " 61 12 33 ef ac bb 62 63 0a\n" "" ""
+
+testcmd "trailing nul" "-ne 'a\0b\0' | od -An -tx1" " 61 00 62 00\n" "" ""
diff --git a/toys/posix/date.c b/toys/posix/date.c
index 7fe0388..f34c347 100644
--- a/toys/posix/date.c
+++ b/toys/posix/date.c
@@ -29,6 +29,9 @@
     YYYY-MM-DD [hh:mm[:ss]]   ISO 8601
     hh:mm[:ss]                24-hour time today
 
+    All input formats can be followed by fractional seconds, and/or a UTC
+    offset such as -0800.
+
     All input formats can be preceded by TZ="id" to set the input time zone
     separately from the output time zone. Otherwise $TZ sets both.
 
diff --git a/toys/posix/xargs.c b/toys/posix/xargs.c
index 26c1b25..cc3ee3d 100644
--- a/toys/posix/xargs.c
+++ b/toys/posix/xargs.c
@@ -26,7 +26,7 @@
     -n	Max number of arguments per command
     -o	Open tty for COMMAND's stdin (default /dev/null)
     -p	Prompt for y/n from tty before running each command
-    -P  Parallel processes (default 1)
+    -P	Parallel processes (default 1)
     -r	Don't run with empty input (otherwise always run command once)
     -s	Size in bytes per command line
     -t	Trace, print command line to stderr