Any way to know other airlines' periods

If one go to other airlines' stock page, it will show:

Facts & figures   last period   before last period

But how could one know what's the airline's period? Say when this data is updated?

On the airline's info page you can see when it was founded.

Thanks, that works, though you need to open a calendar and see what's day it is. Still, it seems a easy move to add the period info on stock page for that airline.