"Sun, 15 Sep 2024 20:40:03"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
20:40:03
General datetime
2024-09-15 20:40:03Z
For Database
2024-09-15 20:40:03
For HTTP1.1
Sun, 15 Sep 2024 20:40:03 GMT