"Sun, 21 Apr 2024 04:40:22"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240421
Only TIME
04:40:22
General datetime
2024-04-21 04:40:22Z
For Database
2024-04-21 04:40:22
For HTTP1.1
Sun, 21 Apr 2024 04:40:22 GMT