UK: the reading of the proclamation of the accession of King Charles III to the people of Northern Ireland at Hillsborou

The transcript is a formal proclamation invoking divine blessings for the monarchy, specifying the date and location of the announcement at Saint James's Palace, and introducing a royal proclamation related to Brazil.

What is the date mentioned in the proclamation?

What is the significance of the phrase 'daughter royal select' in the context of the proclamation?