All of time periods given are from the middle of the 70th week setting up of the Abomination of Desolation. In the last seven years before Jesus Returns, which will commence with the agreement of a 7 year peace treaty between the leader of the One World Government and the leaders of the nation in the holy Land. The first half will be peaceful, so is not mentioned. But when half is spent; Daniel 9:27, the OWG leader will break it and conquer them, at which time the Great Tribulation also begins.

Are Daniels’ days of 1260, 1290, and 1335 linked to the fulfilment of the last three Feasts of the Lord?
Christ fulfilled the four spring feasts at His first Advent.
They are Passover, Unleavened Bread, Firstfruits and Pentecost. Scholars have noted that they were fulfilled precisely and on the day appointed.
It is accepted by many Bible students, with a fair level of confidence: that Christ will fulfill the Fall Feasts at His second coming…….precisely and on the day appointed.

They are the: Feast of Trumpets, Feast of Atonement, Feast of Tabernacles.
1260 days……Starting at the midpoint, the Antichrist is given authority for 3 ½ years….42 months…time, times and half a time. These are all equivalents of 1260 days.
The Antichrists reign ends when Jesus Returns to the earth, which occurs at the end of the 70th week. Satan, the ‘beast’, the Anti-Christ is chained up then.
It is likely that the Return may occur on Yom Kippur, the Day of Atonement: Jewish calendar: Tishri 10

From the time that the regular sacrifice is abolished and the abomination of desolation is set up, there will be 1290 days. ……Daniel 12:11
30 days after Jesus Returns; the Jewish calendar date for 30 days after Tishri 10 is Cheshvan 10. This is the day that Noah and his family entered the ark then 7 days later, the Flood came. Genesis 7:10
This 30 days may be the celebration of the marriage supper of the Lamb. Revelation 19:5-9 It includes the Feast of Tabernacles, Tishri 15 - 22nd.

How blessed is he who keeps waiting and attains to the 1,335 days! Daniel 12:12
Hanukkah is the feast that celebrates the rededication of the temple, on Kislev 25
It was desecrated by the first Abomination of Desolation set up by Antiochus 4th Epiphanes in the second century BC. It is exactly 75 days after Tishri 10.
The 1335th day may be another rededication of the Temple, again on Hanukkah, the celebration of lighting the candles.

The remaining Feast, Yom Teruah on Tishri 1; is the Feast of Trumpets.
This may be the forthcoming Day of the Lord’s wrath, the Sixth Seal event.
This fits with prophecy, as many scriptures say the Trumpet will be blown on that Day. Joel 2:1-2, Ezekiel 7:14, Zechariah 9:14, Isaiah 18:3, Isaiah 29:6, Jeremiah 29:30-31, Hosea 5:8-9
Yom Teruah is also the Day that cannot be certainly dated, as it is declared when the first sliver of the new moon is sighted in Jerusalem. You cannot know the Day.....

The Lord's terrible Day of wrath, will come like a thief, unexpectedly, sudden and shocking everyone. It will commence all the events that must happen before Jesus Returns.