X11 output B 14 - Extreme Irregular Values Excluded from Trading-day Regression

The months in the series are sorted into different groups, depending on the particular day when the month begins (30-day, 31-day months, and Februarys are treated separately). Then extreme values (beyond 2.5 * s; different s values can also be specified) are identified within each type of month in a two-step procedure. The final extreme values that will be excluded are shown in this X-11 table.
For more information, see X-11 Census Method II Seasonal Adjustment .