September 14, 2025 is the 10th anniversary of the first discovery of gravitational waves. The first event was a black hole binary merger named GW150914. It has been the highest signal-to-noise ratio event for long time. This year, another BH merger GW250114 recorded the highest signal-to-noise ratio (see the figure; credit by LIGO/J. Tissino (GSSI)/R. Hurt (Caltech-IPAC)).
There are anniversary events in many institutes including Swinburne or UWA here in Australia. Since the 14th was Sunday, the events are held a few days later.