Question: When did it become illegal to smoke indoors in california?
Disambiguated questions and answers: question: When did it first become illegal to smoke indoors at most workplaces in California?
When did it first become illegal to smoke indoors in bars in California?
When did it first become illegal to smoke in tobacco shops in California?
answer: 1995
January 1, 1995
1998
January 1, 1998
June 9, 2016
2016
Natural Questions answer: June 9 , 2016 (from the Wikipedia article "List of smoking bans in the United States")