What are the timelines for 1095s to employees and the 1094 transmittal to the IRS?

Forms 1095 are normally due to employees by January 31 of each year for insurance information from the previous year. Since the beginning of the Affordable Care Act, however, the IRS has extended that deadline by at least 30 days. The 1094 transmittal is due to the IRS by March 31 of each year, but there have been no extensions for the 1094 transmittal deadline since 2015.