"Sat, 24 Jan 1970 15:13:16"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700124
Only TIME
15:13:16
General datetime
1970-01-24 15:13:16Z
For Database
1970-01-24 15:13:16
For HTTP1.1
Sat, 24 Jan 1970 15:13:16 GMT