"Sat, 21 Sep 2024 15:49:16"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240921
Only TIME
15:49:16
General datetime
2024-09-21 15:49:16Z
For Database
2024-09-21 15:49:16
For HTTP1.1
Sat, 21 Sep 2024 15:49:16 GMT