Earth Day is an annual event scheduled for April 22 to show support for environmental protection.
World Tourism Day's purpose is to raise awareness on the role of tourism within the international community and to demonstrate how it affects social, cultural, political and economic values worldwide.
Find acorns transparent images in HD illustrations and vectors for Thanksgiving day and autumn theme decor.
The peace dove flying with an olive branch in its beak is one of the most commonly featured symbols for the day.
