Hi Rajdeepak,
Do you want to exclude them from the table itself, or just in your analysis?
For the former:

• 
  Create a new Data Job transaction after the insert activity tasks
  
• 
  Put this code in it:
  DELETE FROM <activity_table> WHERE <eventtime_column> IN ('<date_1>', '<date_2>');

  
• 
  Run the code, the rows of the activity table should now be dropped. You can display the number of rows by running:
  SELECT COUNT (*) FROM <activity_table>

  before and after execution.
  

For the latter:

• 
  Open your analysis
  
• 
  Go to the analysis settings and go to Load Script
  
• 
  Type the following PQL statement:
  FILTER "_CEL_AP_ACTIVITIES"."_EVENTTIME" IN ('<date_1>', '<date_2>')

  

Unfortunately there is no way to automize this, unless you find a public available table with all the dates, that you can extract to the Celonis EMS. However, you can make it yourself easier by creating a data pool parameter or text variable respectively to the stated solutions and store the entries over there.
I hope this is an answer to your question.
Best regards,
Jan-peter

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