Field help (CEBDATSTR) 

The ranges of the entered dates make it possible to filter the budgetary objects with a starting date is within this time interval (starting date same as the end date of the period or after). 

The annual envelopes situated in the period are those which start date is situated in the entry period. The pluriannual envelopes situated in the period are those which one of the budgets contains a start date included in the entry period.

By default, the starting date is initialized by the starting date of the last fiscal year budget opened.