Q400
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Fatigue; Workload; Confusion
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Regained Aircraft Control; Flight Crew Overcame Equipment Problem
Procedure; Aircraft; Human Factors
Leaving ZZZ to ZZZ1. I forgot to turn the bleed switches on at acceleration height. Our takeoff required the bleeds to be off. We got a cabin press warning at cruise; to which we noticed the bleeds we're off and we turned them on. This cleared the cabin press warning and pressurization was normal; I went over the E&A checklist to confirm everything. We didn't execute an emergency descent as it wasn't required. Flight continued on with no incidents. Same as above.The early morning; plus the dark cockpit led to me noticing the bleed switch position. In the dark; the switches appear normal. A technique taught during sim is to touch the bleed switches during the acceleration height flow. I'll definitely be using that technique from here on out.
Captain reported not turning engine bleed air switched to on after an engine bleed off takeoff; causing a loss of cabin pressure control.