# Suggestions for a date picker that supports mm/yyyy **URL:** \ **Category:** Ruby\ **Created:** [December 12, 2006, 12:30am UTC](https://www.ruby-forum.com/t/suggestions-for-a-date-picker-that-supports-mm-yyyy/79070 "2006-12-12T00:30:36Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![vinsonizer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/848f3c/32.png) [@vinsonizer](https://www.ruby-forum.com/u/vinsonizer)\ **Post date:** [December 12, 2006, 12:30am UTC](https://www.ruby-forum.com/t/suggestions-for-a-date-picker-that-supports-mm-yyyy/79070/1 "2006-12-12T00:30:36Z")
Does anyone have some suggestions for a date picker that supports mm/yyyy. Also, does anyone know the “best” way to validate a mm/yyyy as “valid”? Meaning this month or the future? Thanks, Jason ---
**Author:** ![vinsonizer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/848f3c/32.png) [@vinsonizer](https://www.ruby-forum.com/u/vinsonizer)\ **Post date:** [December 12, 2006, 12:40am UTC](https://www.ruby-forum.com/t/suggestions-for-a-date-picker-that-supports-mm-yyyy/79070/2 "2006-12-12T00:40:38Z")
Jason Vogel wrote: > Does anyone have some suggestions for a date picker that supports > mm/yyyy. Do you mean a GUI component? > Also, does anyone know the “best” way to validate a mm/yyyy as “valid”? > Meaning this month or the future? Test the entered month and year to see if they are \>= the present month and year? You cold do this by adding the present year \* 12 to the present month, this gives you an easily compared integer with units of months. Do the same to the user’s entry and there you are. If you include days and require the resolution of days, things become more complicated, but for the case of month and year, it is rather easy. ---
**Author:** ![vinsonizer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/848f3c/32.png) [@vinsonizer](https://www.ruby-forum.com/u/vinsonizer)\ **Post date:** [December 12, 2006, 1:34am UTC](https://www.ruby-forum.com/t/suggestions-for-a-date-picker-that-supports-mm-yyyy/79070/3 "2006-12-12T01:34:51Z")
On Dec 11, 2006, at 5:30 PM, Jason V. wrote: > Does anyone have some suggestions for a date picker that supports > mm/yyyy. > > Also, does anyone know the “best” way to validate a mm/yyyy as > “valid”? > Meaning this month or the future? Not sure exactly what validation you are doing with month and year. Maybe you mean mm/dd/yyyy? But, FYI, you can probably validate dates without too much effort since there are only 14 calendars. One for Jan 1 on each day of the week, and another similar seven calendars, except that the year is a leap year. Leap years are yyyy % 4 == 0. This tells you which of the two calendars to choose, assuming you know what day Jan 1 falls on. To get that, pick a starting point and see that Jan 1 moves forward one day for each year, and two days for the year following a leap year. 2000 - Sat 2001 - Mon 2002 - Tue 2003 - Wed 2004 - Thu 2005 - Sat 2006 - Sun 2007 - Mon HTH … Jim F.