A special occasion requires a stunning outfit. 1st rule: Always follow the host's dress code recommendation. If it isn't clearly-defined, the location of the party usually gives a good indication as to where the fashion journey will take you.
An upscale dinner in a beautiful restaurant requires an elegant classic dress that doesn't show too much skin. For a baptism or confirmation, you should also leave the mini skirt & crop top at home. A timeless, tasteful shift dress in traditional colors seems to be more of a suitable choice here.
Frisky birthday or bachelorette parties at a club or cool bar more likely scream for a more revealing party dress. The famous little black one feels quite comfortable here, but also bright colors in shorter skirts guarantee you a stunning appearance.