felicemastronzo, DPC definitely retconned how long ago Zoey left (it's now 'not long ago'), but the new timeline mostly holds up?
Zoey dropped out & went to San Diego just before MC graduated high school (
~June ? Edit more like April/May?). Zoey initially says she had enough money to stay until November, but ultimately ran out of money faster than that (so went home before November).
MC quit his summer job to go to B&R (~August ?). The MC just had midterms, so 0.8 finishes in October, but before Halloween.
MC had seen the Emma cluck by Ep 3 (
~2 weeks after arriving at B&R). So ~September at the latest.
The Emma cluck incident happens late in the Interlude. Learning about Emma/Bret's star-crossed relationship is part of the catalyst which prompts Zoey to go back home. Along with running out of money. So I'd say Zoey left San Diego late September or early October, then spent some time with her mum, before visiting Neil.
Based on that, I'd conclude Zoey & MC have been apart for
4-5 months [
Edit: more like 6-7 months].
Apparently most American's are 18 when they graduate high school, so it's tight age wise, but probably OK given it's plausible & DPC has a disclaimer saying everyone banging is 18+.
NB: I'm not American, my academic dates are Google based, so might be rubbish. Doesn't really impact the conclusion though.