veljačaFebruary
The etymology of this word isn't clear. Croatian Wikipedia says the name may come from the fact days are longer, that is, bigger (
velji) in this month (also see the Croatian dialectal verb "oveljiti" - to make longer, elongate).
The Croatian Language Portal (
hrvatski jezični portal) claims it may come from the verb "valjati" (to roll), since the weather constantly varies, changes (rolls?) in this month;
while the "LearnCroatian" blog claims it might have come from the Slavic pagan holiday "velja noć" which apparently occured at that time.