The personal web site of Rick Koshko (married name Rick Wiegmann Koshko).
To email me, click here for the email form.
I currently use these social networks: LinkedIn, Twitter, Facebook.
My compendium of links to useful, interesting, and cool web sites.



Day-of-the-week formula
Day-of-week calculator
Possible dates for day, month, and year
Possible months for a day, date, and year
Possible years for a day, month, and date
Days between dates
Easter date calculator
400-year perpetual calendar
Gregorian Calendar Lookup
Julian Day number calculator

To contact me
Click here for the email form.


Possible months for a given combination of year, date, and day of the week

If you know the year, date, and day of the week, you can figure out the possible months. This is still in debugging. If you find any erroneous results, please let me know so I can work on it.