Jacobi's hours are various depending on year and which site.
In summary, while in the EDs it is as follows:
Jacobi PGY 1 (Junior yr 1, get assigned patients, close oversight of work up, decisions and procedures): 10 twelve-hour shifts in 14 days
Jacobi PGY 2 (Junior yr 2, get assigned patients, see the work up and dispo through with more independence): 9 twelve-hour shifts in 14 days
Jacobi PGY 3 (Chief year - eval, triage, assign and begin w/u of ALL patients): 6 eight-hour shifts and 3 twelve-hours shifts in 14 days, every other weekend off
Jacobi PGY 4 ("pre-Attending", you are in charge): 7 twelve-hours shifts in 14 days, every other three day weekend off (yeah, picture that!)
Monte PGY 1 - 4: no graduated responsibility, just you and the Attending, though much more independence each year (4th years are essentially just another Attending in the ED). PGYs 1s and 2 have 10 shifts in 14 days, 9 for the PGY3s, 8 for the PGY 4s (sweet indeed).
The Jacobi program is perhaps described as "informal", "self driven" (no hand-holding or strict enforcement of requirements prior to graduation day) with "amazing resources" in what it makes available inside and out of the ED, and "work hard/play hard". You will work hard and be rewarded well for it.
Feel free to send any other Jacobi/Montefiore questions my way.