This is a really good question and it is difficult to answer. The short answer is that the correctness of wearing a black tuxedo during the day is subjective, based on what kind of principles you are trying to observe.
Traditionally, the black tuxedo has been worn only for evening events. Daily events have had a different dress code wear, known as day suits. In the UK, daytime suits are still the standard of formal daytime wear. It will be a taboo to wear something like a black tuxedo during the day. But Britain has a much longer national history and a more established aristocracy that perpetuates and preserves these formal traditions throughout the culture. The same is not necessarily in America, for example.
When America lowered the daily suit to „optional“, a crack was revealed and this crack was a cause for confusion. Most Americans believe they have adapted their own official standards, which are separate from those of others. Others believe that these new traditions are nothing more than wrong.
Instead of a dress code, especially for daily formal events, Desizo Monni does what America has always done – writing the rules as it thinks they work best. Tuxedo under the name Black Tie in Collection Ceremony became less related to daily events and became synonymous with official functions as a whole.
Style and tradition have a kind of relationship like love or hatred. The style is fast and constantly changing. The tradition is slow and steady. But sometimes the style gets something so right that tradition accepts it, and so the traditions develop. As for the daytime tuxedo, there is still some debate. Most people accept this normally. Some cannot.
The most important thing is to get the most out of your big day. The formal outfit you wear on this day should only serve to make the day better rather than stress you. If you want to wear black formal wear on your wedding day, you are right and almost everyone will agree with your decision. To give you some good options, look at the tuxedo below for a very classic look: