The GPS reference epoch was moved from 2000.0 to 2001.0 in G1150 due to anthe Alaskanmagnitude 7.9 Denali Fault earthquake in Alaska in November 2002. Still in 2022 ITRF2020 was released, yet GPS was only using G2139 in its antennas, which was aligned to ITRF2014 (IGb14) (though at epoch 2016.0, not reference epoch 2010.0).<ref name="NOAA2020">{{cite web |last1=US Department of Commerce |first1=National Oceanic and Atmospheric Administration |title=Transitioning from IGS14 to IGb14 - National Geodetic Survey |url=https://geodesy.noaa.gov/CORS/news/igb14/transitioning_to_igb14.shtml |website=geodesy.noaa.gov |access-date=28 June 2022 |language=EN-US}}</ref> On 7 January 2024 move to IGS20 happened, so WGS 84 is now aligned with ITRF2020, including PSD (post-seismic deformation), also called G2296.
On the other hand GLONASS is using PZ-90.11, which is close to ITRF2008 at epoch 2011.0 and is using 2010.0 epoch (that means when you use reference transformation to PZ-90.11 you will get January 2010 date).
