"Sat, 21 Sep 2024 21:18:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240921
Only TIME
21:18:20
General datetime
2024-09-21 21:18:20Z
For Database
2024-09-21 21:18:20
For HTTP1.1
Sat, 21 Sep 2024 21:18:20 GMT