I’m currently working on an Odoo 17 project, and I need to implement a custom date function that is available in Odoo 18. Has anyone come across a similar requirement or know of any references, guides, or modules that could help me achieve this functionality in Odoo 17?

Any insights, links to relevant documentation, or suggestions would be greatly appreciated. It's a bit urgent, so your timely help would mean a lot!

Thank you!