Does the time difference between Melbourne and Tel Aviv change during the year?

Yes. Because of daylight saving time the gap moves between +7h and +9h.

When is the best time to call Tel Aviv from Melbourne?

Between 16:00 and 17:00 in Melbourne, which is 09:00 to 10:00 in Tel Aviv.

Melbourne is 7h ahead of Tel Aviv. This gap is not fixed: daylight saving time moves it between +7h and +9h during the year.

Melbourne

Australia

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Tel Aviv

Israel

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A 9-to-5 day in each city overlaps for 1h. That is 16:00–17:00 in Melbourne, which is 09:00–10:00 in Tel Aviv.

City	Time zone	UTC offset
Melbourne · Australia	Australia/Melbourne	UTC+10
Tel Aviv · Israel	Asia/Jerusalem	UTC+3

What is the time difference between Melbourne and Tel Aviv?: Melbourne is 7h ahead of Tel Aviv. This gap is not fixed: daylight saving time moves it between +7h and +9h during the year.
Does the time difference between Melbourne and Tel Aviv change during the year?: Yes. Because of daylight saving time the gap moves between +7h and +9h.
When is the best time to call Tel Aviv from Melbourne?: Between 16:00 and 17:00 in Melbourne, which is 09:00 to 10:00 in Tel Aviv.