1 used for referring to the time, event, action, person etc that comes after this one or after another one
I’ll call you the next time I’m in town.
the next few weeks/several months/five years etc:
Over the next few weeks I tried to re-organize the office.
next Tuesday/week/year etc (=the Tuesday, week, year etc that comes after this one):
I’ll see you next Friday.
Monday/Tuesday etc next (=the Monday, Tuesday etc after this one):
The ceremony will take place on Monday next.