Multiple outlets report that International Sherlock Holmes Day is being observed by “armchair detectives” in different places, highlighting the continued popularity of Arthur Conan Doyle’s fictional detective. The Independent notes celebrations linked to Sherlock Holmes’s imagined address at 221B Baker Street in central London, as well as tributes that extend beyond the UK, including references to a cliffside waterfall in the Swiss Alps. The Winnipeg Free Press also covers the observance, indicating that interest in Holmes-themed events and activities reaches audiences in Canada as well. While details of specific activities are not fully described in the provided excerpts, the shared theme is that people use the day to engage with Holmes stories and Holmes-related culture from home or through themed events and discussion. Belfast Telegraph similarly runs the same “game’s afoot” framing for the day, reinforcing that the observance is being marked across multiple regions. Overall, coverage emphasizes global fan participation rather than any single official event or organizer.