A computer-implemented method comprises, obtaining a digital calendar item for an event, determining, that the event has begun, and in response to determining that the event has begun, accessing a location and determining which of the participants are present for the event, determining, during the event, that one participant shared a digital data item with the other participants or as part of the event, and in response to determining that the participant shared the digital data item, at least transiently storing a reference or link to the digital data item, determining that the event has ended, and in response to determining that the event has ended, updating the digital calendar item by adding the reference or link.