"Sat, 21 Sep 2024 23:21:05"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240921
Only TIME
23:21:05
General datetime
2024-09-21 23:21:05Z
For Database
2024-09-21 23:21:05
For HTTP1.1
Sat, 21 Sep 2024 23:21:05 GMT