"Sat, 15 Feb 2025 23:47:31"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20250215
Only TIME
23:47:31
General datetime
2025-02-15 23:47:31Z
For Database
2025-02-15 23:47:31
For HTTP1.1
Sat, 15 Feb 2025 23:47:31 GMT