Commercial Fixed Wing
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Communication Breakdown; Distraction; Fatigue; Human-Machine Interface
Deviation - Speed All Types; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Regained Aircraft Control; Flight Crew Became Reoriented
Human Factors; Environment - Non Weather Related
After departing ZZZ I was the pilot monitoring on climb the flaps were retracted before appropriate speed. After noticing I told the Captain and he lowered to nose about 5 degrees and the plane accelerated normally.We had come from ZZZ1 with a show time of XA10. This flight had no crew meals. We landed in ZZZ and had 1 1/2 hrs till this flight. Neither the Captain or myself could get anything to eat because nothing was open in the terminal. We were both hungry and HOT. On taxi out we both made the comment how hot the plane was and the COVID mask didn't help that. There were several airplanes taking off with similar call signs and it was busy. I personally felt a little Task saturated after takeoff. The Captain called for flaps up right at radio call and frequency change. I never looked up and retracted the flaps.I feel that I should have been offered at least a snack. The airplanes should have the APU left on in the ZZZ heat. I find the COVID mask to be a distraction. Somehow we need to address similar call signs. Turn the autopilot on ASAP at busy airports.
Flaps were retracted prior to appropriate speed.Fatigue from excessive heat in receiving aircraft; wearing a mask; and no food easily obtainable. Obstructed view of PFD due to bright ambient light; dim PFD illumination; mask and associated fogging from breath. Lack of recent flight experience. As I looked at the PFD I was unable to see S speed. I did not recall what it was in knots. The aircraft was light. I assumed we had flown through it and requested ' flaps up.' The FO; who was also having fatigue issues; who was also distracted by many similar call signs; selected flaps up. Airspeed immediately came into view; I lowered the nose and; due to a high density altitude; the aircraft slowed then slowly began to accelerate. We proceeded on to ZZZZ1 without further event. I was hand flying attempting to regain proficiency after a long period of little flying activity.Acknowledge fatigue and call off the trip. Acknowledge fatigue and use the auto-flight systems. Replace screens so that their content is more visible. Change ATC call signs so that they sound different and our call sign is more easily distinguishable. Make sure food is available. Provide de-fogger for glasses. Keep aircraft cool.
Air carrier flight crew reported retracting the flaps during climb before the appropriate airspeed and stated that fatigue; hunger; and excessive heat in the aircraft contributed to the event; and the COVID-19 mask was a distraction.