I do calendars, where it displays a month grid with days of the week at top, calculates the start day of the month, changes box colors for non-month days, month

I do calendars, where it displays a month grid with days of the week at top, calculates the start day of the month, changes box colors for non-month days, month days, current day, etc. I add more bits if the language is more robust like filling in sample events, add in a month pager for control testing, etc. This provides me enough math, control logic, looping and display logic to see what's what.