The World Series started in the early 1900s, but to answer precisely for a specific year you asked about (“20”), the earliest and most authoritative reference points show that:
- The World Series began in 1903, and the event has been played as a best-of-seven series between the American League and National League champions since 1903, with a brief interruption in certain years (notably 1994 due to a strike) and with a standard seven-game format established in 1922. For context, the very first World Series began on October 1, 1903, and over the years the start dates have varied, with many early series starting in October and a few earlier-starting instances in September in the 1900s and 1910s.
If you’re asking about a particular year or a specific “20” (for example, 1920, 2020, or a different interpretation), please clarify which year you have in mind and I can provide the exact start date and schedule details for that World Series.
