"Sun, 21 Apr 2024 12:35:17"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240421
Only TIME
12:35:17
General datetime
2024-04-21 12:35:17Z
For Database
2024-04-21 12:35:17
For HTTP1.1
Sun, 21 Apr 2024 12:35:17 GMT