sentences:  Between 1780 and 1797 — known as the Patriot era, leading up to the Batavian Revolution — the day was used for demonstrations of loyalty to the House of Orange, which is probably why the current name was chosen in the 19th century for the ceremonial opening of parliament.Historically, the constitution has stated that the opening of parliament should take place on a fixed date.The opening of parliament was originally held on the first Monday in November in the first half of the 19th century, and then the third Monday in October, but when a constitutional revision introduced annual budgets in 1848, more time was needed to debate the budget, so the date was brought forward a month.