Does it matter if the eight characters count as the wedding date but the time is wrong?

More or less, it has some influence, but it has little influence. Specifically, you should ask the person who timed you. Only they know these things best, and laymen think they are not important. Insiders think that amateurs are talking nonsense and pointing others in the wrong direction. Moreover, the wedding day should be regarded as a big day, which is very important and prudent. Don't be afraid to ask the master who counts your days. Or you can ask the elderly at home. Old people know these things better. After all, they have crossed more bridges than we have. Just ask the old people, and then ask the master for a few days.