"Sat, 21 Sep 2024 18:18:47"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240921
Only TIME
18:18:47
General datetime
2024-09-21 18:18:47Z
For Database
2024-09-21 18:18:47
For HTTP1.1
Sat, 21 Sep 2024 18:18:47 GMT