"Thu, 29 Jan 1970 12:02:39"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700129
Only TIME
12:02:39
General datetime
1970-01-29 12:02:39Z
For Database
1970-01-29 12:02:39
For HTTP1.1
Thu, 29 Jan 1970 12:02:39 GMT