Simbrief new AIRAC not available

Hello, on the Simbrief website the new AIRAC 2309 is not selectable. When will this be available on the website?

Kind Regards,

Indeed. And the weird thing is that the new AIRAC is available in the FMS Manager, so all my aircrafts are already updated to 2309.

Maybe there’s a technical glitch?

Everything is possible.
Let’s wait for the official answer.

Simbrief still shows AIRAC 2308 as “Current Cycle”.
I have no 2309 anywhere in Simbrief, not even grayed out and unselectable.

Should the AIRAC not be available by 09:00Z on the new cycle day? Just asking …


Hi guys,

The cycle is 2309 since a little while on SimBrief. We’re investigating what might have caused the delayed switch.

Kind regards,


2309 is available for me now. Thanks for looking into this.

Thanks, but Simbrief says valid to 04/OCT/23 but the Cycle Info (e.g Simtoolkit Pro) says Valid (from/to): 07/SEP/2023 - 05/OCT/2023

What is right?

04/OCT/23 or 05/OCT/23 ?

Kind Regards,


Cycle 2310 will release on Oct 5. So Oct 4 is the last full day of 2309. You can see the full calendar on our website:



Thank you Stephen :slight_smile:

Have a great weekend :+1:

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