"Sun, 15 Sep 2024 21:40:01"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
21:40:01
General datetime
2024-09-15 21:40:01Z
For Database
2024-09-15 21:40:01
For HTTP1.1
Sun, 15 Sep 2024 21:40:01 GMT