"Sat, 10 Jan 1970 14:11:49"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700110
Only TIME
14:11:49
General datetime
1970-01-10 14:11:49Z
For Database
1970-01-10 14:11:49
For HTTP1.1
Sat, 10 Jan 1970 14:11:49 GMT