Birthday Calender is a weekly or monthly calender
Render a card for each day of week\day of month. For a given year, figure out whose birthday belongs to which card. Place people's initials in the card according to these rules-
- Each person must always be rendered as square
- Use person's initials to label birthdays
- Order people inside the card based on their age (youngest to oldest)
- Each square in a card must be of equal size and should fill up as much space in the card as possible