"Sat, 24 Jan 1970 18:03:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700124
Only TIME
18:03:23
General datetime
1970-01-24 18:03:23Z
For Database
1970-01-24 18:03:23
For HTTP1.1
Sat, 24 Jan 1970 18:03:23 GMT