build: load time/tzdata on Windows #18676
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Nomad uses `time.LoadLocation()` to translate a periodic job time zone
string value to a `time.Location`. From godocs:
LoadLocation looks for the IANA Time Zone database in the following locations in order:
* the directory or uncompressed zip file named by the ZONEINFO environment variable
* on a Unix system, the system standard installation location
* $GOROOT/lib/time/zoneinfo.zip
* the time/tzdata package, if it was imported
So non-Unix systems require Go to be installed or `time/tzdata` to be
imported, otherwise running periodic jobs with a specific `time_zone`
value results in an error:
Invalid time zone "America/Toronto": unknown time zone America/Toronto
This commit adds the `timetzdata` build tag on Windows to embed the time
zone data into the final binary. This results in a slightly bigger
binary, but from `time/tzdata` godocs:
Importing this package will increase the size of a program by about 450 KB.
[..]
This package will be automatically imported if you build with -tags timetzdata.
lgfa29
added
backport/1.4.x
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Here's an example of running a periodic job with binaries that have and don't have the time zone data embedded: 
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This was referenced Oct 6, 2023
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Nomad uses
time.LoadLocation()to translate a periodic job time zone string value to atime.Location. From godocs:So non-Unix systems require Go to be installed or
time/tzdatato be imported, otherwise running periodic jobs with a specifictime_zonevalue results in an error:This commit adds the
timetzdatabuild tag on Windows to embed the time zone data into the final binary. This results in a slightly bigger binary, but fromtime/tzdatagodocs:Closes #18578