'First Day' in the Bible

And it came to pass in the eleventh year, in the first day of the month, that the word of Jehovah came unto me, saying,

And it came to pass in the seven and twentieth year, in the first month , in the first day of the month, the word of Jehovah came unto me, saying,

And it came to pass in the eleventh year, in the third month , in the first day of the month, that the word of Jehovah came unto me, saying,

And it came to pass in the twelfth year, in the twelfth month, in the first day of the month, that the word of Jehovah came unto me, saying,

Thus saith the Lord Jehovah: In the first month , in the first day of the month, thou shalt take a young bullock without blemish; and thou shalt cleanse the sanctuary.