Once In a Blue Moon

Once In a Blue Moon ?

Do you know what I mean ??..

that's an quotation for not very often....

Blue moon is a second full of month which is hapenned in the same a month..

Based on Fira Basuki's book "Biru".

Interval between full a mont with another full of month is around 29.5 Days. Meanwhile the average of a month have 30.5 days.There's a possibility have a twice full of month is often in a month.

So we can says once in a bloo moon is once every two-and-a half years.

"can you get it".....

ooh, hold on second ... this is my birthday anyway, so ??? Zum Geburtstag... its must be seventeen I guest..:)...