how to set a dynamic variant for date in select-options to First and Last day of the year?

[Former Member]

Hi Variant experts Good Evening!
I have the following problem while setting up a dynamic variant for date fields (for example in a variant for SDBONT06) .

For the 2 date fields for VBOF variants I want to have dynamic values "First day of the year" and "Last day of the year". I do not actually find such options among the selection variables for date dynamic selection list.

Does anyone have an idea?
Thanks and best Regards

Madjid