Quotations from the early church fathers who support the Jewish year 6000 as significant to eschatology

In Judaism, [Year 6000](https://en.wikipedia.org/wiki/Year_6000) (2239 AD) marks the latest time for the initiation of the [Messianic Age](https://en.wikipedia.org/wiki/Messianic_Age) so the Year 6000 will mark the beginning of Sabbath day for God. [2 Peter 3:8](https://www.biblegateway.com/passage/?search=2+Peter+3%3A8&version=ESV) says: > But do not overlook this one fact, beloved, that with the Lord one day is as a thousand years, and a thousand years as one day. By this calendar ([calculator here](https://www.hebcal.com/converter)) : - Jesus died on [14 Nisan, 3793](https://penelope.uchicago.edu/~grout/encyclopaedia_romana/calendar/jesus.html) (3 April 33 AD) - 1 Tishrei, 4001 was 5 September 240 AD - 1 Tishrei, 5001 was 25 September 1240 AD - 1 Tishrei, 6001 will be 17 September 2240 AD I wonder whether: 1. the Jewish calendar was in use by the time of the Apostles and the early church fathers. 2. the early church fathers said anything about the end of the Jewish year 4000 (240 AD) or the medieval church about year 5000 (1240 AD). 3. the Apostles / Augustine / the early church fathers linked this Year 6000 to the return of Jesus or to the [millennial rule of Jesus](https://www.gotquestions.org/thousand-year-reign-Christ.html) on earth in any way. 4. the New Testament concept of "The Last Days" has any connection to the duration between the Year 3793 (Christ died) to the Year 6000 (end of the 6th millennium). 5. the early church fathers interpreted any symbols in the eschatological passages (such as those in Daniel, Isaiah, Ezekiel, Revelation, etc.) according to the Year 6000. **My question is more general**: Quotations from the early church fathers who support the Jewish year 6000 as significant to eschatology, which could be used to answer any of the above questions.