It is possible to change the absence plan period?

Hello experts,

We need to create a new absence plan with a particular feature, the standard funcionality to the absence plan period is Annual (12 months):

For example:
Absence plan period : 15/12/2024 to 14/12/2025 (1 year or 12 months)

The customer need modify this period to 11 months. Example:

New absence plan period: 15/12/2024 to 14/11/2025

Please experts, can you tell me if it's possible this configuration?

Thanks so much for help.