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