Light Transport
Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Instructor; Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 5; Flight Crew Total 6700; Flight Crew Type 2500
Fatigue; Situational Awareness; Other / Unknown
Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Human Factors; Environment - Non Weather Related
This was a second flight of the night shift; and was unusually busy; because the hospital we are associated with is understaffed because of COVID. We got the call to go to ZZZ; and the weather was marginal; but good enough to get in. We accepted the trip; and flew the RNAV approach to Runway XX. Later; I looked at the approach chart; and it said that the approach was not authorized at night. I think that being busy after a long period of hardly flying contributed to the error; and also that it was XA:00 in the morning. Also; due to COVID-induced rules; we had to wear masks flying; and it fogs up my glasses; making it harder to see. I need to make sure that I check all the notes on an approach before accepting a trip.
Air Taxi Captain reported flying an RNAV Approach which was not authorized at night.