1. Create a Constituent query
  2. On the Criteria tab, select:
    First Gift, Gift Date greater than or equal to [the earliest date for which a gift can be considered new] 
  3. To refine the query results, add additional criteria. For example, to query on constituents whose first gift was to a specific campaign, add:
    AND First Gift, Campaign, Campaign Description equals [name]

OR

  1. Create a New Donors Report
  2. On the General tab, select the necessary date range
  3. Mark the 'Create Constituent output query' checkbox
  4. Click Preview