How about a timeline from the House?
These investigations are done by a third party, and presented to Congress.
https://oversight.house.gov/sites/democrats.oversight.house.gov/files/Timeline%20of%20Events%20with%20Flynn.pdf
https://www.feinstein.senate.gov/public/_cache/files/4/5/4591f0ff-5413-474f-b1a7-8a4f3e11e273/D200A8D0FAACA9114E1F47501D56830D.flynn-timeline.pdf
https://oversight.house.gov/news/press-releases/whistleblower-provides-key-info-about-flynn-text-to-business-colleague-during