Thread: How Long is Considered a Month
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Old 02-19-2008, 02:54 PM
Englishteacher1 Englishteacher1 is offline
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Join Date: Dec 2007
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Default How Long is Considered a Month
We have many definitions of a month. A lunar cycle is about 28 days. Some calendar months have 30 days and some have 31. For monthly contact lenses, how long is a "month"?
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