"Sun, 15 Sep 2024 21:50:55"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
21:50:55
General datetime
2024-09-15 21:50:55Z
For Database
2024-09-15 21:50:55
For HTTP1.1
Sun, 15 Sep 2024 21:50:55 GMT