My daughter was accelerated from kindergarten to first grade mid-year. It waan't ideal because she didn't have a chance to prepare, but t has worked very well. She is in fourth grade now.
If your daughter is happy, it may be better to negotiate for next year so you can prepare her. Schools are often very resistant, so it helps to have testing (some will test, but many don't offer anything u tip third grade). It may help to get private testing. I arranged my daughter's skip by moving her to a private school, then the wanted to have her repeat a year even though she was doing well academically. Private testing helped convince them to let her stay in the higher grade.
You can always try it and then move her back.
