Texas Instruments TI-84 Plus Manual Book page 644

where: 1 =
M
1 =
DT
1 =
Y
2 =
M
2 =
DT
2 =
Y
MB =
DB
=
YB
=
Appendix B: Reference Information
+ (number of days
+ 2
DT
(
+
Y2 YB –
------------------------
4
month of first date
day of first date
year of first date
month of second date
day of second date
year of second date
base month (January)
base day (1)
base year (first year after leap year)
to 2)
MB M
)
641