Strong’s Dictionary of Hebrew Words:
Meaning:
of foreign origin; Shebat, a Jewish month
Potts’ Bible Proper Names:
A twig; a scepter; rod; tribe:―eleventh month Jewish sacred year, Zech. 1:7. {Ramus}
From Manners and Customs of the Bible:
Zechariah 1:7. The eleventh month, which is the month Sebat.
Sebat corresponds very nearly to our month of February.