"Sun, 12 May 2024 18:21:55"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240512
Only TIME
18:21:55
General datetime
2024-05-12 18:21:55Z
For Database
2024-05-12 18:21:55
For HTTP1.1
Sun, 12 May 2024 18:21:55 GMT