"Sat, 10 Jan 1970 19:44:52"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700110
Only TIME
19:44:52
General datetime
1970-01-10 19:44:52Z
For Database
1970-01-10 19:44:52
For HTTP1.1
Sat, 10 Jan 1970 19:44:52 GMT