Philadelphia is 7 hours behind Tel Aviv
Best overlap: 3:00 PM to 6:00 PM in Tel Aviv is 8:00 AM to 11:00 AM in Philadelphia.
For the smoothest call, aim inside 3:00 PM to 6:00 PM in Tel Aviv, i.e. 8:00 AM to 11:00 AM in Philadelphia. A 3-hour overlap gives you a workable daily window; aim for earlier in it to avoid clipping the end of someone's day.