There are doce meses (12 months) in un año (a year) in Spanish, just as in English. However, as with the days of the week, the months don't start with a capital letter.
un mes - a month
un año - a year
When you look at the months of the year in Spanish you can probably guess what they mean as many are very similar to English.
Apart from enero that is!
enero - January
febrero - February
marzo - March
abril - April
mayo - May
junio - June
julio - July
agosto - August
Did you notice the similarities?
The last four months of the year all end –ber in English. Look at the Spanish and see what you notice.
septiembre - September
octubre - October
noviembre - November
diciembre - December
That’s right. The –ber ending in English becomes –bre in Spanish.
To say something happens in un mes (a month), you use the word en (in).
en - in
Mi cumpleaños es en octubre. - My birthday is in October.
Voy de vacaciones en julio. - I go on holiday in July.