The Prefill Start date and End date from the linked activity or event flag is available in the Duration section of the mobility activity details screen, when creating or updating a mobility activity in a KA1 Youth project from call 2023 onward. 

When the flag is ticked, the Start date and End date fields become read-only, containing the dates as defined in the linked activity or event. 

Prefill Start date and End date from the linked activity or event flag