This is a challenge cache.
It is located at the posted coordinates.
You can sign the log at any time but to claim a find you must also qualify for the challenge.
For this challenge you need to find a minimum of 20 caches in each of 20 different D/T squares on your grid.
Any 20 individual D/T ratings will do.
NB: Caches found prior to the publication of this challenge may be used to qualify.
2020 (MMXX) is the current year, and is a leap year starting on Wednesday of the Gregorian calendar, the 2020th year of the Common Era (CE) and Anno Domini (AD) designations, the 20th year of the 3rd millennium, the 20th year of the 21st century, and the 1st year of the 2020s decade.
Source: Wikipedia