Wisdom on the Yugas.

https://popularvedicscience.com/history/yugas/kali-yuga/
https://popularvedicscience.com/history/yugas/kali-yuga-events/
The Brahma Vaivarta Purana (related to Rathantara kalpa) mentions a ten thousand-year period, starting from the traditional dating of the Kali Yuga epoch, during which bhakti yogis will be present. Lord Krishna foretold that Kali Yuga will be full of extreme hardships for people with ideals and values.

10,000-year Golden Age

“For 10,000 years of Kali such devotees of Mine will be present on earth. After the departure of My devotees there will be only one varna, Outcaste.”

“(Sri Krisna said:) Lord Hari will stay on this earth for the first ten-thousand years of Kali-yuga. Till then gods will be worshipped and the Puranas and scriptures will also be present.”

“ 'In this Age of Kali there is no religious principle other than the chanting of the holy name, which is the essence of all Vedic hymns."

https://vedabase.io/en/library/cc/adi/7/74/