What year were all coins silver?

All U.S. coins were made of silver until 1965, when the Coinage Act was enacted, transitioning most coins to a copper-nickel composition due to rising silver prices and a shortage of silver. Prior to this change, dimes, quarters, and half dollars contained 90% silver. However, some coins, like the silver dollar, continued to be minted in silver until 1935, when the last of the regular silver dollar production ended.