Many IFR (instrument flight rules) zones today - east and west coastal waters, Florida, mid-TX, Chicago/Great Lakes.
Also a security zone over Naushon Island near Martha's Vineyard.
Issue Date : June 22, 2021 at 1538 UTC
Location : Vineyard Sound, Massachusetts near MARTHAS VINEYARD VOR/DME (MVY)
Beginning Date and Time : June 26, 2021 UTC 1230-2000 Daily
Ending Date and Time : July 01, 2021 UTC
https://skyvector.com/
https://tfr.faa.gov/save_pages/detail_1_8173.html