We need to fetch the Date of donation in the formula type Global Absence Discretionary Donation Rule

We need to fetch the Date of Donation in the formula type Global Absence Discretionary Donation Rule, as shown in the screenshot below.

We have tried fetching the effective date in the formula, but it is not working correctly.

Could you please suggest how we can fetch the Date of Donation in the above-mentioned absence formula type?

Thanks,

Varun