Month 1 (Abyb) begins with the 3rd New Moon following the winter solstice.
Days for No Buying and Selling:
New Moon Day (The first evening and day following the conjunction i.e. complete disappearance of the moon.)
(Numbers 10:10), (Psalms 81:3)
The 1st, 2nd, 3rd, and 4th Shabat of each month (The 8th, 15th, 22nd, and 29th of the month as counted from the New Moon)
(Leviticus 23:3)
The first day of Unleavened Bread and the Seventh Day (Shabat) following the feast (The 15th and the 22nd of the first month called Abyb)
(Leviticus 23:6)
The Feast of Weeks (Seven complete weeks from the day after the wave offering (i.e. the 23rd of the month Abyb), the 16th day of the 3rd month)
(Leviticus 23:15)
The Feast of Trumpets (The 1st day of the seventh month)
(Leviticus 23:23)
The Day of Atonement (The 10th day of the 7th month, a complete day of rest, an appointed shabat)
(Leviticus 23:26)
The Feast of Tabernacles (The 15th day and the 22nd day of the 7th month)
(Leviticus 23:33)
Things to remember
The 30th Day of each Month
(To make preparation for New Moon Day, the Day of Gladness, a solemn day. This is not a shabat day. Work, buying, selling not forbidden)
(Deuteronomy 16:1) (1 Samuel 20:5 )