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.


Calendars are cool! Well, this is another one of those things I'm into that either you're into or you're not.