"Sat, 21 Sep 2024 20:48:51"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240921
Only TIME
20:48:51
General datetime
2024-09-21 20:48:51Z
For Database
2024-09-21 20:48:51
For HTTP1.1
Sat, 21 Sep 2024 20:48:51 GMT