Israel Independence Day, Yom HaAtzmaut is celebrated in Israel on He b'iyar, as per the Hebrew calendar.
The Declaration of the Establishment of the State of Israel (excerpt)
Eretz Israel (the Land of Israel) was the birthplace of the Jewish people. Here their spiritual, religious and political identity was shaped. Here they first attained to statehood, created cultural values of national and universal significance and gave to the world the eternal Book of Books.
Jews strove in every successive generation to re-establish themselves in their ancient homeland... they made deserts bloom, revived the Hebrew language, built villages and towns, and created a thriving community, controlling its own economy and culture, loving peace but knowing how to defend tself...
The State of Israel ... will foster the development of the country for the benefit of all its inhabitants; it will be based on freedom, justice and peace as envisaged by the prophets of Israel; it will ensure complete equality of social and political rights to all its inhabitants irrespective of religion, race or sex; it will guarantee freedom of religion, conscience, language, education and culture; it will safeguard the Holy Places of all religions; and it will be faithful to the principles of the Charter of the United Nations.
We extend our hand to all neighbouring states and their peoples in an offer of peace and good neighbourliness, and appeal to them to establish bonds of cooperation and mutual help with the sovereign Jewish people settled in its own land.