File: — Doublep_210608-210615.zip ...

: Represents the start date in YYMMDD format (June 8, 2021). 210615 : Represents the end date (June 15, 2021).

Based on standard naming conventions, here is how the text breaks down: File: DoubleP_210608-210615.zip ...

This filename appears to be an archive of project or transaction data spanning from June 8, 2021, to June 15, 2021. : Represents the start date in YYMMDD format (June 8, 2021)