Budapest is 6 hours ahead of Washington, D.C.
Best overlap: 8:00 AM to 12:00 PM in Washington, D.C. is 2:00 PM to 6:00 PM in Budapest.
8:00 AM to 12:00 PM in Washington, D.C. is when Budapest is also working, at 2:00 PM to 6:00 PM their time. You've got a decent 4-hour window. Set a recurring time near 8:00 AM in Washington, D.C. (2:00 PM in Budapest) and stick to it.