Follow the traditional order, line by line
The classic structure never changes: host line, request line ('request the honour of your presence'), the bride's name, 'to' or 'and,' the groom's name, then the date, time, and venue, and finally the reception note. Each element gets its own line, centered, working from the most formal at the top to the practical at the bottom. Learn the skeleton once and every wedding invitation you write falls into place.
The host line tells guests who's inviting them
Whoever is hosting — traditionally the bride's parents — leads the invitation, and their names signal its formality. 'Mr. and Mrs. James Whitfield request the honour of your presence' is the most formal; 'Together with their families' is the modern, egalitarian choice when both sides contribute or the couple pays their own way. If the couple hosts alone, they can simply invite guests in their own names.
Spell out the date, time, and everything else
Formal wedding invitations spell out numbers rather than using digits: 'Saturday, the fourteenth of June, two thousand twenty-six, at half past four in the afternoon.' The city and state are written out in full, no abbreviations, and 'half past four' is preferred to '4:30.' The traditional 'honour of your presence' spelling (with a u) is reserved for a religious ceremony; 'the pleasure of your company' is the phrasing for a non-religious venue.