Mentri Besar Tan Sri Khalid Ibrahim said the decision was made for the convenience of voters, who would go to the polls tomorrow.
He said the public holiday would help the people of Selangor carry out their responsibility as voters.
The declaration is in line with Paragraph 9 of the Public Holidays Act 1951, which states that the state government can declare one day a year as a public holiday, he said in a statement yesterday.
“We hope that the public day will be used to return to the voters’ respective constituencies, and that they don’t have to rush back to work,” he said.
“We pray that all voters will return safely to carry out their duties as Malaysians.”