When you report on timeline by date there is no way to group the date by month/quarter etc. Our team uses timeline to log everything, which is great, but there is no way for us to analyze the average time spent on certain activities by month. We would really love this feature.
Our use case is they might enter the Timeline Post in today, but the meeting with the customer actually took place last week. They'd like it to show up as LAST WEEK when the meeting actually took place.
We are planning to give summarize by week/month etc ability on the date field in timeline object. Currently, there is no parity on how we support it across multiple databases in MDA (redshift, Postgress etc). I will update here on ETA of this feature as we take it up.