I was able to pull up these details on the date change.
The IRS announced on February 5, 2019 that victims of the earthquake that took place on November 30, 2018 in Alaska may qualify for tax relief. Individuals who reside or have a business in the Municipality of Anchorage, Kenai Peninsula Borough and Matanuska-Susitna Borough have until April 30, 2019, to file certain individual and business tax returns and make certain tax payments.