When to travel to Israel, part 2

2nd May, Lag B'Omer great day, and especially previous night to be in Israel, as all the beaches, parks and open lots are covered with groups of people having Bon fires and barbecues. The 2nd is a National holiday.
19th May, Shavuot, this holiday is neither her nor there for travelers. It is one day when many businesses and transport services are closed, but it is just 24 hours and can go unnoticed. The holiday is celebrated by eating lots of milk based products, like cakes and ice-creams.
20th July Tisha B'Av a religious fast day that can go unnoticed if you don't go visiting extremely religious areas.
19th September, Rosh Hashana, the Jewish New Year, from the previous night the religious areas close down until sundown on 19th. But in places like Tel Aviv and large non-religious cities, there are "New Year" parties. It is not such a big deal as the Gregorian New Year, which by the way is also celebrated in Israel.
28th September Yom Kippur not a good day to be in Israel, EVERYTHING is closed, including most roads. This of course is from sundown of 27th to sundown of 28th.
3rd October Sukkot: School holiday for a week starting on 3rd for a week. 3rd and 10th religious holidays - most areas closed. But the plus point is the interesting Sukkot, or temporary dwellings that nearly all Israelis build in their gardens, on balconies and in their parking lots, to fulfil the mitzvah of eating in this sukka for a week. All Kosher restaurants will also provide a Sukka for the religiously observant to eat in.
On the 11th October, Simcha Torah, the end of Sukkot, and many celebrations in Synagogues, most businesses closed.
12th December, Hannuka, the holiday which can coincide with Christmas but in 2010 doesn't. No religious holiday when things are closed, but for the week long holiday kids are on holiday, so places are a little more crowded. On Hannuka, each city and home lights an additional candle each night in a menorah/candelabra of sorts. There is a holiday atmosphere, but no religious limitations.

Photo from Graphic freebies