Here is the Runperiod Data present in my IDF File, Energyplus v9.1.0
RunPeriod, WholeYearDay, !- Name 1, !- Begin Month 1, !- Begin Day of Month , !- Begin Year 12, !- End Month 31, !- End Day of Month , !- End Year Tuesday, !- Day of Week for Start Day Yes, !- Use Weather File Holidays and Special Days Yes, !- Use Weather File Daylight Saving Period No, !- Apply Weekend Holiday Rule Yes, !- Use Weather File Rain Indicators Yes, !- Use Weather File Snow Indicators ; !- Treat Weather as Actual