(11C) Calendar Routines

01042020, 10:30 AM
Post: #1




(11C) Calendar Routines
HP11C Solutions Handbook doesn't provide the Calendar Routines.
Found that HP55 Mathematic programs got the "Calendar Routines" program so I adapted this program to work for HP11C For those who have HP55 Mathematic Program book this routine is on page 75 As stated in this book: This program called March 1, 1700, day 1 and gives every succeeding day a corresponding number. The program works for days to and including February 28, 2100. However, for days from March 1, 1700, to Febuary 28, 1800, 2 days must be added to tha answer and for days from March 1, 1800, to February 18, 1900, 1 day must be added.  Procedure: [USER] [FIX] 0 [A] Month // 1 for January [B] Day // 1 to 31 [C] Year // 2020 [D] Day of the Week // 0 = Sunday [E] Days Between Two Dates // 1st Date start Label [D] 2nd Date [E]  Example: What day of the week for 1/4/2020 1 [A] display 1 4 [B] display 4 2020 [C] display 2020 [D] display 6 // Answer is Saturday  Dates from previous problem how many days to 1/31/2020 Month and Year is the same only change the day to 31 31 [B] display 31 [E] display 27 // Answer: 27 days  Program: Code:
Gamo 1/4/2020 

05252021, 11:27 AM
Post: #2




RE: (11C) Calendar Routines
Here is another Calendar routine to find "Number of Weekdays Between Two Dates"
and find the "Date" form the mm/dd/yyyy at which result 0 is Sunday 1 is Monday and so on. This program is from the HP67 adapted to work on the HP11C Sample Problem Apr. 1, 1974 and May 1, 1974 4.011974 [A] 5.011974 [A] ——— 22.0  Find the Date on Jan. 1, 1960 1.011960 [A] [B] ——— 5 (Friday)  Program: Code:
Gamo 

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