"Sun, 21 Apr 2024 20:15:34"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240421
Only TIME
20:15:34
General datetime
2024-04-21 20:15:34Z
For Database
2024-04-21 20:15:34
For HTTP1.1
Sun, 21 Apr 2024 20:15:34 GMT