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