The official filing date is the date that an accepted annual account has been uploaded.

A few examples in order to clarify this:

Example 1:

Saturday 1. July – annual account is uploaded
Monday 3. July – annual account is accepted
Wednesday 5. July – collection of filing costs
The annual account is published. The filing date is Saturday 1.. July.

Example 2:

Saturday 15. May – – annual account is uploaded
Monday 17. May – annual account is refused
Monday 17. May – new filing and acceptance of an adapted annual account
Wednesday 19.May – collection of filing costs
The annual account is published. The filing date is Monday 17. May