Excel 2010 calculate week beginning date and week ending date

How can I calculate the beginning date of the week and the ending date in a week to show like this 6/1 - 6/7.  I inherited a report that needs to keep this format going.  The week starts on a Monday 00:00:00 and ends on Sunday 23:59:59.  All I need is to show the month/day for the beginning of the week and the end of the week and all of this needs to be in one cell.
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pls try


EDITED Formula

Roy CoxGroup Finance ManagerCommented:
There's a typo in the formula, it should be

Rob HensonFinance AnalystCommented:
You can use the FLOOR and CEILING functions for this:


Gives the previous Saturday so adding +2 on the end will give the Monday date


Gives the following Saturday so adding +1 will give the Sunday.

So combination of the two with a dash:


Rob H
Corrected typo and formula


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Rob HensonFinance AnalystCommented:
For completeness, the FLOOR and CEILING functions work the same as MROUND, ie they round a number to the specified factor. The difference being that MROUND will round to the nearest whereas FLOOR will always go down and CEILING will always go up.

Due to the way that Excel stores dates, day 1 of the Excel calendar** is 01/01/1900 which was a Sunday and therefore every 7th day was a Saturday, therefore the serial number for any Saturday will always be a factor of 7.

**Unless using 1904 system.

Rob H
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