"Sat, 21 Sep 2024 15:38:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240921
Only TIME
15:38:23
General datetime
2024-09-21 15:38:23Z
For Database
2024-09-21 15:38:23
For HTTP1.1
Sat, 21 Sep 2024 15:38:23 GMT