CIFS Date and Time Encoding
Dates are encoded as follows:
struct {
USHORT Day : 5;
USHORT Month : 4;
USHORT Year : 7;
} SMB_DATE;
The Year member has a range of 0-119, which represents the years 1980 - 2099; Month ranges from 1-12; and Day ranges from 1-31.
Time is encoded as follows:
struct {
USHORT TwoSeconds : 5;
USHORT Minutes : 6;
USHORT Hours : 5;
} SMB_TIME;
The Hours member ranges from 0-23, Minutes ranges from 0-59, and TwoSeconds ranges from 0-29, representing two-second increments within the minute.
64-bit Absolute and Relative Time Encoding
The TIME data type indicates a signed 64-bit integer representing either an absolute time or a time interval. Times are specified in units of 100ns. A positive value expresses an absolute time, where the base time (the 64-bit integer with value 0) is the beginning of the year 1601 AD in the Gregorian calendar. A negative value expresses a time interval relative to some base time, usually the current time.
typedef unsigned long UTIME;
where UTIME is the number of seconds since Jan 1, 1970, 00:00:00.0.