"Sat, 21 Sep 2024 19:21:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240921
Only TIME
19:21:20
General datetime
2024-09-21 19:21:20Z
For Database
2024-09-21 19:21:20
For HTTP1.1
Sat, 21 Sep 2024 19:21:20 GMT