"Sun, 12 May 2024 09:40:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240512
Only TIME
09:40:15
General datetime
2024-05-12 09:40:15Z
For Database
2024-05-12 09:40:15
For HTTP1.1
Sun, 12 May 2024 09:40:15 GMT