Its the Mi'kmaq flag.
A red cross or crescent on a white background.
There might be another answer, but I have a sideways cross necklace and for me it just means the same thing a normal cross means: Jesus's death, burial, and ressurection to save us from the sin we as humans are inherently prone too. The sideways cross necklaces and bracelets you see aren't stating anything different than a cross every has, they are just a fashion statement
The cross has long been a symbol of Christianity: the Crusaders, the Cross of Malta...... Red and white can easily be seen during conflicts, be it on ambulances or a waving flag. It was assumed that,on seeing the red and white symbol, the enemy would realise that the wounded were being evacuated and would not attack them. In Muslim countries a green crescent on a white background is used.
White
sideways
lunula
The spider that is black with a white crescent on its back is the Brown House Spider. This spider is often confused with the red-back spider.
The confederate flag flown in the American Civil War had the same colors as today's flag- red, white, and blue. The flag has a red background with a sideways cross of blue, outlined in white. There are white stars inside the cross representing each of the states that seceded from the union. The red is said to represent the fearlessness of the confederacy itself, the white represents purity, and the "bonnie blue" represents justice and the perseverance of the people of the South.
Surely a white cross on a white flag is a white flag ! I surrender !
a sidEWAYS blue and white lighting bolt
Comoro Islands had a flag with a green over red field, with a white crescent moon and white stars during the 1970's. There is no longer any red in the Comoro flag.
White Cross on Okinawa was created in 1945.