Which Day of the Week was My Birthday?

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How to find the day of the week on which your birthday will fall next year?


Which day of week was my birthday last year?

Today it is my birthday and somehow I was curious to know the day of the week on which I was born. Using Microsoft excel I found out that it was Thursday. I also tried listing the day of the week for all my birthdays till I will be 100 years old. I noticed a very simple but interesting facts about the days on which our birthday falls.

Every year the day advances by one day from previous year. For example I was born on 5th April 1984, Thursday. On my first birthday that is on 5yh April, 1985 it will be Friday.

But on every leap year it advances by 2 days. To understand this please refer the table below –

Date Day
5-Apr-84 Thursday
5-Apr-85 Friday
5-Apr-86 Saturday
5-Apr-87 Sunday
5-Apr-88 Tuesday
5-Apr-89 Wednesday
5-Apr-90 Thursday
5-Apr-91 Friday
5-Apr-92 Sunday
5-Apr-93 Monday
5-Apr-94 Tuesday
5-Apr-95 Wednesday
5-Apr-96 Friday

As per the above table, you can see from year 1984 to 1987, every year the days were advancing by one day. But from 1987 to 1988 (leap), increased by 2 days. Then again it from 1988 to 1991 it increases by one day each year.

So with above logic, now if any one ask me what day was it on my last (2009) birthday, if this year (2010) my birthday is on Monday. It’s very simple, it was Sunday. And next year (2011) it will be Monday. After that (2012 – leap year) it will be Wednesday as on a leap year it will increase by 2 days.

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Vineet Patawari

Hi, I'm Vineet Patawari. I fell in love with numbers after being scared of them for quite some time. Now, I'm here to make you feel comfortable with numbers and help you get rid of Math Phobia!

One thought to “Which Day of the Week was My Birthday?”

  1. I knew this a yr back…thanks for reminding… I like this site and am a regular follower!!

    Keep up the good work

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