Emperor is a Norwegian black metal band formed in 1991, regarded as highly influential by critics and emerging black metal bands. The group split up in 2001, but reunited from 2005 to 2007 for a few festival dates and brief US tours, and again reunited in 2013 to 2014. The group was founded by Ihsahn (guitar/vocal) and Samoth (then, drums).
If I randomly chose a date in 2005, I would choose a date on which Norwegian black metal band Emperor was split up.
The context statement only states that the band reunited in 2005. That means that they may have been split up for part of 2005 and may have been reunited for part of 2005. So if I chose a date at random, they may or may not have been split up on the random date in 2005.