* The northern edge of Chihuahua changes to US timekeeping.
* Much of Greenland stops changing clocks after March 2023.
* Fix some pre-1996 timestamps in northern Canada.
* C89 is now deprecated; please use C99 or later.
* Portability fixes for AIX, libintl, MS-Windows, musl, z/OS
* In C code, use more C23 features if available.
* C23 timegm now supported by default
* Fixes for unlikely integer overflows
* Much of Greenland stops changing clocks after March 2023.
* Fix some pre-1996 timestamps in northern Canada.
* C89 is now deprecated; please use C99 or later.
* Portability fixes for AIX, libintl, MS-Windows, musl, z/OS
* In C code, use more C23 features if available.
* C23 timegm now supported by default
* Fixes for unlikely integer overflows
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