The Blue moon day

[copperstream]

Do you know what a blue moon days?

 

The average period of lunar revolution is nearly 27.6 days.

 

certain months of certain calendar has nearly 32 days.

 

If a full moon day appears during the first or the second day of the month, another full moon day appears during the end of the month.

 

This day is known as blue moon day

[NeonBlack]

Do you mean that 31 days is 'nearly 32 days'?

[Janus]

The sideal month (fixed star to fixed star) is 27.3 days

The synodic month (full moon to full moon) is 29.531 days.

 

It is the synodic month that determines whether or not there is a Blue Moon in any given calender month.

 

27.6 days is close to the anomalistic month. (perigee to perigee or apogee to apogee)

[copperstream]

I'm not talking about any other months.Iam an Indian. Certain months of Tamil calendar (Aadi , Thai ) have obviously 32 days (rarely). So according to our calendar , we see blue moon days once in five years.

[Janus]

I'm not talking about any other months.Iam an Indian. Certain months of Tamil calendar (Aadi , Thai ) have obviously 32 days (rarely). So according to our calendar , we see blue moon days once in five years.

 

Regardless of which calendar you use, it is with conjunction of the synodic month period (29.531 days) that Blue moons occur.

[copperstream]

I just replied neon black . im sorry