Near the end of Chrono Cross I think its Kid that tells Serge that its time to go and save Schala, considering she's been "waiting for 10k years" or so.
So the question is, The End of Time and Darkness Beyond Time are examples of Time Error, but they have a timeline of their own(right?) but at what point in their timeline do they connect with the other timelines?
Like for example, how long has Gaspar been at the end of time when Crono and the others arrive, how long has Schala been at the Darkness Beyond Time before she's saved?