What is the 'priority rule' in EU trademark law
For EU trademarks (EUTMs), these rules are laid down in Article 34 of the EU Trade Mark Regulation (EUTMR). This article stipulates, that the priority period is limited to six months and is calculated from the date of the first application. It is the interpretation of the term "first application" that led to the October Coloratura ruling.
The effect of the right of priority is that the date of priority will count as the date of filing of the European Union trade mark application for the purposes of establishing which rights take precedence in inter partes proceedings.

Such details provide a deeper understanding and appreciation for Eu Trademark Priority Date.
EUIPO Guidelines
Simple filing receipts containing the country, number and date of the earlier application (s) are accepted. The documentation in support of the priority claim must be filed within 3 months of the filing date . If the mark concerned is in colour, colour photocopies must be submitted for the earlier application (s).

The right of priority has the effect that the date of priority will count as the date of filing of the EU trade mark application for the purposes of establishing which rights take precedence.
Additional Notes on Eu Trademark Priority Date
Impact of Trademark Priority Dates On USPTO Registrations - Drishti Law. This note connects the source idea with the visuals in a simple, reader-friendly way.
The EU Trademark Explained. It works as a short bridge between the article summary and the gallery section.
Registering a Trademark in the European Union: What You Need to Know. The extra context helps the page feel more useful without forcing the same phrase repeatedly.
Looking at multiple sources also helps separate the main idea from small decorative details.
These notes are added so the page offers more than images and gives each visitor a clearer reason to keep reading.