HP 49g Graphing Calculator - Manual (Page 113)

To determine the number oFdays between two dates
1. Press ®
ddays .
2. Enter the first date in number format (see the table on page page 12-1).
For example: 3.212001 (that is, Mai'ch 21, 2001).
3. Press 0Q.
4. Enter the second date, also in number format.
For example 5.232001 (that is, May 23, 2001).
5. Press (ENTER).
The answer is 63.
In RPN mode: follow steps 2, 4, and 1.
Calculating with times
You can work with times expressed in decimal fonnat or in HMS fonuat. A
niunber in HMS fomiat is displayed as H.MMSSs where:
H = zero or more digits representing the number of hours
MM = two digits representing the number of minutes
SS = two digits representing the number of seconds, and
s = two or more digits representing the fractional part of seconds.
To convert decimal time to HMS format
1. Press (CAT) -^HMS.
2. Enter the time in decimal fonuat.
For example: 7.125 (that is, seven-and-one-eightli hours).
3. Press (EH).
The answer is 7.07300 (that is, 7 hom's, 7 minutes and 30 seconds).
In RPN mode: follow steps 2 and 1.
Page 12-4 Date and time arithmetic