GHDR stands for "Groundhog Day Resolutions", a yearly planning ritual that I have been doing since 2007. It is based on three observations:
I'm not ready to make year-long strategic goals on January 1st. Waiting until February 2nd (Groundhog Day here in the United States) gives me the time I need to close-out the previous year and reflect.
By noticing the date pattern 2/2, 3/3, etc, I can remember to review periodically to stay on track.
The Groundhog Day movie and the idea of prognosticating rodents fills me with glee!
For the details, see this term definition in the GHDR category of this site.