When to wear your "bride" shirt

Not sure what you do for work. IMO, it's not a professional shirt to wear. I wouldn't wear it because of that, but if you have a more casual job where you don't have to be super professional, then I think it's fine to wear. You are a bride!

I didn't even know this was a thing outside of bachelorette parties. I'd find it weird and inappropriate if someone wore a bride shirt to work. It just doesn't fit in that setting. Even if it was a small business and all coworkers were invited to the wedding, it still isn't an appropriate time for wearing it. It would feel like you were trying to force your coworkers to make their workday all about you. That's kind of off-putting.

As others said, it should be worn during wedding related activities.

I've been wearing Bride apparel since the day after I got engaged which was July 2017 for a Sept 2019 wedding! So it is ALWAYS ok to rock the bride to be apparel! I have a shirt that says bride and my wedding date and I wear it everywhere and anywhere possible!

I don't think there's a time limit to when you can wear "Bride" clothing but I probably wouldn't wear it to work - as others have said it just doesn't seem appropriate, even on "casual Friday".