This has nothing to do with the objective fact that time and seasons exist independently of calendarsGood thing it's not counting time on Venus. You'd have much bigger calendars, I suppose. "Venus rotates much more slowly than Earth does, so a day on Venus is much longer than a day on Earth. A day on Venus lasts for 243 Earth days or 5,832 hours!" Bigger clocks, too. maybe, unless scientists can figure a small clock counting 5,832 hours in a day. Maybe some will have a good time joking about that maybe. Ask an Astronomer!
The claim that it is impossible for time to have passed if people didn't have calendars is hilarious and wrong