"Sun, 15 Dec 2024 18:18:52"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
18:18:52
General datetime
2024-12-15 18:18:52Z
For Database
2024-12-15 18:18:52
For HTTP1.1
Sun, 15 Dec 2024 18:18:52 GMT