Narrative:

R2501 was released at 16000 feet and above. At xb:00 it was going 'hot' released to ZLA 29000 feet and above. At approximately xa:50; I issued aircraft X to descend now to 28000 feet then descend at pilots discretion to 24000 feet. At xb:00 R2501 went hot and alerted on my scope. As I saw this; aircraft X was about 2 miles from the airspace and at 28300 feet. I immediately told aircraft X to climb to 29000 feet immediately for active military airspace. Forty seconds later; aircraft X entered R2501 at 28600 feet climbing to 29000 feet. I was aware of the change and just forgot at the time when I gave the clearance. A controller in charge was in charge and did not warn the area of the change as we normally do. Have the airspace come onto the scope 2 minutes prior to remind people sooner rather than it just coming onto the scope at the exact time.

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Original NASA ASRS Text

Title: ZLA Controller reported forgetting that a local restricted area was about to become active and descended an aircraft into the airspace.

Narrative: R2501 was released at 16000 feet and above. At XB:00 it was going 'HOT' released to ZLA 29000 feet and above. At approximately XA:50; I issued Aircraft X to descend now to 28000 feet then descend at pilots discretion to 24000 feet. At XB:00 R2501 went hot and alerted on my scope. As I saw this; Aircraft X was about 2 miles from the airspace and at 28300 feet. I immediately told Aircraft X to climb to 29000 feet immediately for active military airspace. Forty seconds later; Aircraft X entered R2501 at 28600 feet climbing to 29000 feet. I was aware of the change and just forgot at the time when I gave the clearance. A Controller in Charge was in charge and did not warn the area of the change as we normally do. Have the airspace come onto the scope 2 minutes prior to remind people sooner rather than it just coming onto the scope at the exact time.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.