...that the opening ceremonies of the Galway to Clifden railway were very sparsely attended because the event date was a strict church holiday and was reserved for attending church services?
The fact noted must be mentioned in the subject article.
At least one fact in the template at any time needs an associated image; more facts may have images, but only one should be displayed in the template to keep it from looking too cluttered.
The template can be updated at any time, but please note the date that facts were added and give each fact at least two days on the template (longer than two days is fine, but don't let it go too long between updates).
When adding new facts to the template, put the date that the fact was added into an HTML comment so other editors know which facts are oldest.
The subject of the article noted in the DYK fact is listed in boldface type.
The section should have a minimum of three and maximum of five facts.
The newest facts in the template should be listed at the top.
If the article's talk page already has {{WikiProject Trains}}, add the portaldykdate parameter to that template call when you use a fact from an article for this section.
After adding a fact to the DYK section, copy the fact and the image(s) to the appropriate archive page (below).