I want to know the answer to the following question:
What does the TZ value EST5EDT,M3.2.0/02:00,M11.1.0/02:00 specify?
All the background I'm provided with is that "Such a TZ value must be changed whenever DST rules change, and the new value applies to all years, mishandling some older timestamps.". Is that enough to answer the question?
Answer: no