5.1 DOS Date and Time Format

The DOS date and time value is an unsigned 32-bit value divided into six fields as follows:

DOS date and time format

The legal values for each field is listed in the following table.

Field

Value

Year

Offset from 1980 (e.g., decimal 10 is 1990)

Months

1-12

Days

1-31

Hours

0-23

Minutes

0-59

Biseconds

0-29

Each bisecond indicates two seconds.