A mint prepares metallic calendars specifying months, dates and days in the form of monthly sheets (one plate for each month). How many types of calendars should it prepare to serve for all the possibilities in future years?

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Solution

The first day of the year can be any one of the days of the week, i.e the first day can be selected in 7 ways.
But, the year could also be a leap year.
So, the mint should prepare 7 calendars for the non-leap year and 7 calendars for the leap year.
So, total number of calendars that should be made = 7 + 7 = 14

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Q. Calendar
Let us look at the calendar for the year 2006.
• How many months does a year have? _____________
• List the months which have 30 days. _____________
____________________________________________________
• List the months which have 31 days. _____________
____________________________________________________
• How many days does the month of February have? ___________
• How many days makes a week? ___________
• How many weeks are there in July? ___________ Is it true for all the months? _____________
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• Make a circle on these dates in the calendar:
26th January
14th November
31st December.
Is there something special about these dates?

The method used for remembering the number of days in the months of the Gregorian calendars is known as___.

Q. Look at a calendar to find out:
• Which months have 30 days?
___________________________________________
• How many months have 31 days? _______________
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