The seven Old Testament (=Hebrew) Festivals are:

7 feast of the Menorah

Spring festivals

• Around start of April:
  • 1. Pesach / The Passover (Jesus Cross)
  • 2. Unleavened Bread: This feast was to last for 7 days
  • 3. First Fruits (Jesus ressurection)

Overlapped with pagan holiday: Easter➡ "Eostre" / Beltane

An outlier

• Around half May:
  • 4. Shavuot / Feast of Weeks (Pentecost) -- (50 days after 'First Fruit' is the First Harvest. First time Holy Spirit came onto disciples of Jesus Christ)

Overlapped with pagan holiday: None!

Fall festivals

• Around start of October
  • 5. Rosh HaShanah/ Feast of Shouting / Trumpets (2nd coming of Christ)
  • 6. Yom Kippur / Day of Atonement
  • 7. Sukkot / Feast of Tabernacles

Overlapped with pagan holiday: Halloween/"All Hallows' Day" ➡ Samain

An outlier

• Around start of December:
  • Hanukkah / Feast of Lights - its origin is non-Mosaic (see link)

Overlapped with pagan holiday: Christmas

Overview of western holidays with pagan origins:

Despite Christianization, the importance of agricultural and social cycles had preserved "the ancient British festal system", which he believed consisted of eight holidays corresponding to

• Candlemas (2 February),
• Lady Day (25 March),
• May Day (1 May),
• Midsummer Day (24 June),
• Lammas (1 August),
• Michaelmas (29 September),
• Halloween (31 October),
• Christmas (25 December).