"Sat, 21 Sep 2024 15:18:17"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240921
Only TIME
15:18:17
General datetime
2024-09-21 15:18:17Z
For Database
2024-09-21 15:18:17
For HTTP1.1
Sat, 21 Sep 2024 15:18:17 GMT