Hello Sir,

I have to figure out the date of 3 months ago from today. The rule is:

1) if today is the month end (e.g. 30/06/2013), then 3 months ago will also be the month end (e.g. 31/03/2013).

2) if today is not the month end (e.g. 10/06/2013), then 3 months ago will have the same day (e.g. 10/03/2013). But this has some exceptional case, because some month has 30th while other month does not. For example, if today is 30/05/2013, then 3 months ago will be in February which does not have 30th. In this case, just make it as the month end of 3 months ago.