Stock Inheritance into Trust and Acquisition Date.

I am the trustee for my father's trust who passed away in 2024.  He had shares of stock that were inherited into the trust that were then sold and cash distributed to myself and siblings.  My question is about what to put in the Acquisition Date column for the shares.  The financial company shows 12/28/2023 as the acquisition date.  We inherited the shares on 1/29/2024...the date of his death.  These are long term capital gain transactions but TurboTax does not let me indicate for long term capital gains that they were coming from my father (decedent) any where.  Short term gains, it asks me to qualify those as coming from a decedent or not.  Anyway, any thoughts on which date to use?