First, the Third Temple is to be built, according to the prophecy of Ezekiel. From Rosh Hashanah to Yom Kippur, there must be a consecration of the altar. On these days, from 1st to 10th Tishrei, the messengers of Jesus Christ must enter the Eastern Gate of the Third Temple.
From the 11th Tishri, the Eastern Gate of the Third Temple will be closed forever. From the 11th Tishri, the count of 2300 evenings and mornings begins, during this period the Christian religion and Judaism will ignore this Messianic Temple and will not recognize the act of people entering the Eastern Gate as the coming of God.
2300 evenings and mornings consist of two periods. During the first period, the Christian religion and Judaism will not recognize this Temple. But Judaism will not recognize both the Temple and Jesus Christ as the Messiah, and the Christian religion will not recognize only the Temple. Therefore, during the first period it is necessary to count mornings and evenings.
The non-recognition by Christians of the Temple and the saints is the non-recognition of the "morning sacrifice," at the beginning of the Day of the Lord, which will last 1000 years. Judaism’s non-recognition of Jesus Christ is "evening" because Jesus died in the evening (they will not recognize the Temple either). The second period will come when Judaism recognizes Jesus Christ as the Messiah, recognizes the Temple as the shrine of Yahweh, and recognizes the people who entered the Eastern Gate of the Temple to be holy. Therefore, the second half of the period will count only mornings, that is, the second period is the non-recognition by the Christian religion of the Temple and the saints.
The first half should end around the 17th of Tammuz in the 3rd year after the construction of the Temple. The Christian religion recognizes the Temple as the shrine of God only in the 4th year of the Temple, around 1st Iyar.
1st Nisan of the 4th year of the Temple is the end of the period of 1290 days, counted from the 11th Tishri, as well as 2300 evenings and mornings.
1335 days is the period from Tu B'Shvat of the 1st year of the Temple to Simchat Torah of the 4th year of the Temple when you can eat the fruits of the planted Tree, in accordance with Leviticus 19:23-25. The period of 1335 days may not come true every year, but only in certain years of the Jewish calendar, because a year in the Jewish calendar may have a different number of months and days. (2019 is suitable for building the Temple, 2020 and 2021 are not suitable.)
1260 days of a woman clothed with the sun is not the same as 1260 days of two witnesses. 1260 days of the woman are counted from Simchat Torah of the 1st year of the Temple to Pesach of the 4th year of the Temple, when space will be allocated for the City of Yahweh Shammah and tribes of Israel will receive their land in accordance with the prophecy of Ezekiel.
And 1260 days of "two witnesses" ended in 2005, when the Christian religion did not react to the coincidence of two super strong earthquakes with the two main holidays, Christmas and Easter. The starting point for the period of the prophecy of the "two witnesses" is the construction of the 2nd Temple by Zerubbabel. 1260 years of the first witness, the Jews, must be added up with the 1260 years of the second witness, Christians. Because these are "two olives" from the 11th chapter of the Epistle to the Romans, these are Jews and Christians, faithful to Jesus Christ.
42 months of madness of pagan Christians correspond to 42 months of the beast, but not equal to 1260 days. The 42 lunar months are about 1240 days. This period, the period of the power of the beast, will begin from the 9th month, Kislev, and end simultaneously with the end of the period of 1290 days and the period of 2300 evenings and mornings, 1st Iyar.
The beginning of the power of the beast roughly corresponds to the celebration of Hanukkah.
As for the 5 months of locust, this is most likely the time of the construction of the Third Temple. The temple will be built very quickly.
Some discrepancy may be due to the fact that political decisions will be made not on feasts, but immediately before these days.
More detailed explanations can be found on our forum.