The WT organization was expecting Christs arrival in kingdom power in 1914. It published this date years before its arrival.
Actually, since 1874.
Ironically, CT Russell didn't accept the 1874 date as Jesus' return until 1876. Two years late to the game for god's alleged 'faithful slave' and it's been downhill ever since.
When it all went south, 1874 was changed to 1914.
Wash, spin, rinse, repeat.
The 1914 date foundation was a major mistake because of what Jesus said at Matthew 24:36, Matthew 24:42 and Acts 1:7.
Or maybe the real mistake is believing in the fanciful musings of ancient goatherders.