"Sat, 21 Sep 2024 17:09:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240921
Only TIME
17:09:20
General datetime
2024-09-21 17:09:20Z
For Database
2024-09-21 17:09:20
For HTTP1.1
Sat, 21 Sep 2024 17:09:20 GMT