"Sun, 15 Sep 2024 18:38:14"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
18:38:14
General datetime
2024-09-15 18:38:14Z
For Database
2024-09-15 18:38:14
For HTTP1.1
Sun, 15 Sep 2024 18:38:14 GMT