I'm working on a Universal windows store app and I want to add a simple calendar so that users can add birthdays of their friends and save them and some other stuff. Is there any simple way to do this?
PS: Using Visual Studio 2013
What I do understand about Calendars, is there are fourteen of them in total that are possible - seven for each day of the week a normal year begins on, and seven more for leap years. You may have to create all fourteen and put them in somehow. There is instead a formula for working out what day of the year anyone was born on by their date of birth, and formulae can be programmed into r or other programmes using perhaps the for loop, or if command. This formula is :
{4(d+y)+x-4c}/28, where d is what number day of the year it is - so Jan 1st, d=1, and so on, but for Leap Years it gets different from Feb 29, y is the year in question, x the closest year before y divisible by four, and c an era constant. For modern dates, c=0, so no worries, but if You go back before September, 1752, it changes, as this is when the British went from the Julian to the Gregorian, while in Catholic Europe it was October, 1582, but these are only a concern if You are into such historical dates. For those, c=1, but may have different values much earlier - if You want to know more, reply to this, and I will get out what I have written on it. For example, if one was born on 17th May, 1979, you would go :
{4(137+1979)+1976-4 times zero}/28, which equals 372 plus six sevenths - you ignore the whole number, and look at how many sevenths there are. Six means Thursday, and thus the 17th May, 1979 was a Thursday. This is it in short - for more details, if this interests, feel free.