Quote from admin on 2024-02-25, 12:15 pm

go at : https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Fmainnet.liberland.org#/staking/targets

For each validator row, there is a stat button at the right of the row.
When you click to see the validator stats, the x-axis is the era axis.

1 era = 6 hours
4 eras = 24 hours = 1 day
100 eras = 25 days
500 eras = 125 days
1000 eras = 250 days