Date: 202007
Local time of day: 1201-1800
Location: ZZZ.Airport, US
Flight conditions: VMC
Light: Daylight
Aircraft: Small Aircraft; Low Wing; 1 Eng; Fixed Gear
Operator: Personal
Operating under: Part 91
Flight plan: None
Mission: Personal
Flight phase: Initial Climb
Airspace: Class G ZZZ
ATC / advisory: CTAF ZZZ
Reporter organization: Personal
Reporter function: Single Pilot
Reporter qualification: Flight Crew Commercial; Flight Crew Flight Instructor; Flight Crew Multiengine; Flight Crew Instrument
Human factors: Confusion
Anomaly: ATC Issue All Types; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance
Detector: Person Flight Crew
When detected: In-flight
Result: General None Reported / Taken
Contributing factors: Environment - Non Weather Related; Procedure; Human Factors
Primary problem: Human Factors

Narrative: ZZZ airport is currently undergoing major construction; with numerous runway and taxiway closures.  ZZZ has multiple intersecting runways and a high historical instance of runway incursions.  Additionally; Tower hours of operation and staffing are reduced due to COVID-19.  Tower closes at XA:00 local time; fairly early for summer operations.  With tower closed airspace reverts from Class D to Class G. ZZZ has 4 runways XXL/R; YYL/R; ZZL/R and AAL/R.  Runways XX which are the prevailing wind runways are right pattern for XXR and left pattern for XXL.  There is a note in the Chart Supplement that closes all runways except YYL / XXR when Tower closed and changes the pattern direction from right traffic to left traffic for Runway XXR.On the day of the flight I spent extra time reviewing NOTAMs for the airport given the construction and Tower closure (Class G operations were in effect during my flight a little after XA00).  I was planning a short flight; but spent a good bit of time familiarizing myself with alternative taxi routes; self announce procedures; no-tower operations; etc.  The startup; taxi; runup and takeoff from XXR were normal.  Unfortunately I had missed the note about the change of pattern direction and planned a right downwind departure more in line with my departure direction (vs. left pattern operations prescribed after Tower closure).  There were no other aircraft in the pattern and the departure was normal otherwise. Upon return for landing; there was one additional aircraft in the pattern using left traffic for XXR.  I queried them about the pattern direction and they mentioned the left traffic for XXR after Tower closure.  I made several landings in the pattern using left traffic on XXR and the remainder of the flight; landing and taxi back was normal.After shut down; I pulled out the chart supplement and found the note about the left traffic after Tower closure.  Contributing to my error were the following:*Complacency with home airport.  I have been flying out of this airport and instructing for XY+years and thus felt familiar with all the notes about the airport.*Lack of recency with non-towered operations at the home airport.  It had been probably X+ years since conducting night operations at the field when the Tower was closed and the single runway and revised traffic pattern were in effect.  *Delays in my arrival to the airport before the flight and aircraft departure created an expectation bias that I was going to conduct the flight during tower operating hours and thus prevented me from thinking through all the implications of non-towered operations in the middle of the day. Lessons learned.*Conduct a periodic review of home airport chart supplement for any possible changes over the years or just as a refresher.  This goes for airports that I often visit and feel comfortable.*Add a thorough review of the chart supplement notes in addition to NOTAMS when operations are 'out of the ordinary'   *Include chart supplement in the loop with foreflight review.  The change of pattern direction note is either not in foreflight or not easily found.




Synopsis: Pilot reported flying the approach traffic pattern in the wrong direction after Tower had closed.