"Sat, 21 Sep 2024 18:39:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240921
Only TIME
18:39:15
General datetime
2024-09-21 18:39:15Z
For Database
2024-09-21 18:39:15
For HTTP1.1
Sat, 21 Sep 2024 18:39:15 GMT