Comments by "Todd Webb" (@toddwebb7521) on "Timeline of World History | Major Time Periods u0026 Ages" video.

  1. Where there's not a year 0 that means the years that end in 0 are technically the last year of the previous decade and not the first one of the new decade. So 2020 is the last year of the 2010s and not the first year of the 2020s
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