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Friday 13th 2009

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BigEv | 23:29 Thu 29th Jan 2009 | Science
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Hi all...

Friday 13th falls in February, March and November this year.

How often does it occur that Friday 13th falls on 2 consecutive months in a single calendar year as it does in February and March?.

All help very much welcome and appreciated.

Ev.
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Avatar Image Rollo
It can only ever happen in Febrauary and March, because February is the only month that has a number of days that is exactly divisible by 7.

So it happens every year that February 13 is a Friday - except in leap years.
23:32 Thu 29th Jan 2009
Avatar Image BigEv
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Thanks Rollo, much appreciated!!

Ev.
15:08 Fri 30th Jan 2009
Avatar Image kweenii
If a month starts with the first day being a Sunday, it will contain the date Friday 13th
10:45 Wed 11th Feb 2009

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