Date: 202202
Local time of day: 0601-1200
Location: ZZZ.Airport, US
Flight conditions: VMC
Light: Daylight
Aircraft: EMB ERJ 145 ER/LR
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Taxi; Climb
Airspace: Class D ZZZ
ATC / advisory: Tower ZZZ
Aircraft component: Pressurization Control System
Component problem: Improperly Operated
Reporter organization: Air Carrier
Reporter function: First Officer; Pilot Not Flying
Reporter qualification: Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Human factors: Communication Breakdown; Situational Awareness; Troubleshooting
Second reporter function: Pilot Flying; Captain
Anomaly: ATC Issue All Types; Aircraft Equipment Problem Critical; Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Ground Incursion Taxiway
Detector: Automation Aircraft Other Automation; Person Flight Crew
When detected: In-flight
Result: Air Traffic Control Provided Assistance; Flight Crew Overcame Equipment Problem; Flight Crew Regained Aircraft Control; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Returned To Departure Airport; Flight Crew Took Evasive Action; General Maintenance Action; General Flight Cancelled / Delayed
Contributing factors: Aircraft; Human Factors; Procedure
Primary problem: Human Factors

Narrative: Aircraft X from ZZZ to ZZZ1. I was the FO (First Officer) and the pilot monitoring and the Captain was the Pilot Flying. The time was approximately XA:25-XA:30 at ZZZ when we picked up the ASOS (Automated Surface Observing Systems). At the end of the ASOS there was a message from the Tower from last night stating that the Tower is closed after XQ00 local time and for IFR services to contact ZZZ Center. As we pulled out from the gate I announced on CTAF Frequency our intentions to taxi to Runway XX via Taxiway XX. We got a response from Tower saying the Tower is open and to contact Ground. We contacted Ground and they said to taxi to XX via 1. Once back on with the Tower Controller we asked her when the Tower had opened and she said at XA:00 and we mentioned the ASOS stated that they were closed and she said they had forgotten to flip the switch for the ATIS. The cause was the Tower forgetting to flip the switch to broadcast the ATIS when they opened so the ASOS was still broadcasting and it stated the Tower was closed. The Tower needs to make sure they are broadcasting the ATIS when they open.


Second narrative: Aircraft X. ZZZ-ZZZ1. Captain was the PF (Pilot Flying) and the PM (Pilot Monitoring) was FO (First Officer) NAME. After receiving the ASOS at XF:20z (XA:20 local time) the remarks said the Tower closed at XQ:00 local time. With this being said; there was no Tower resume operations time said and the Jeppsen charts has very little information about the closed/open times for Tower operations. All the field conditions report in the release says FAA TOWER OPEN XC00-XL00 HRS. After de-icing we left the gate and contacted CTAF to mention our intentions for taxi and departure approximately XA:55 local time. After we told CTAF we were taxiing to Runway XX. The Tower Controller told us to contact Ground and that the Tower was open. Both myself and the FO did not hear that the Tower resumed operations and quarried the Controllers. We explained that the ASOS was still reporting the Tower was closed at XQ:00 and was under the impression that CTAF was in effect. The Tower apologized and said they opened at XA:00 local time and forgot to flip the switch. We asked if there was any issues and the reply was no. We taxied to the runway with ground and Tower with no issues.Failure of ATC not stating the airport was open for operations and no accurate Tower operations times.Having a form of or having an updated Airport Facilities Directory of all online as well as off line airports we have listed in the ops specs.


Synopsis: Flight crew reported an erroneous message over the ASOS stated the tower was closed and that the tower had forgot to switch to ATIS when they opened for the day.