August 18 is:

Serendipity Day

Anniversary of the discovery of helium

Anniversary of some discoveries about the Sun

Bad Poetry Day

Anniversary of the start of the Wilkes Expedition

Anniversary of the first child of English parents to be born in the Americas

Disappearance Day

Anniversary of a Fireball

Click on the date to find what special day it is:

August
7	6	5	4	3	2	1
14	13	12	11	10	9	8
21	20	19	18	17	16	15
28	27	26	25	24	23	22
				31	30	29
Special days on different dates