Nope, 15 April
"This relief does not apply to estimated tax payments that are due on April 15, 2021. These payments are still due on April 15. Taxes must be paid as taxpayers earn or receive income during the year, either through withholding or estimated tax payments. In general, estimated tax payments are made quarterly to the IRS by people whose income isn't subject to income tax withholding, including self-employment income, interest, dividends, alimony or rental income. "
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https://www.irs.gov/newsroom/tax-day-for-individuals-extended-to-may-17-treasury-irs-extend-filing-a...
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*