"Sun, 19 May 2024 18:42:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240519
Only TIME
18:42:15
General datetime
2024-05-19 18:42:15Z
For Database
2024-05-19 18:42:15
For HTTP1.1
Sun, 19 May 2024 18:42:15 GMT