"Sat, 21 Sep 2024 21:45:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240921
Only TIME
21:45:21
General datetime
2024-09-21 21:45:21Z
For Database
2024-09-21 21:45:21
For HTTP1.1
Sat, 21 Sep 2024 21:45:21 GMT