black maxi long sleeve dress Comfy A-line fitted waist sits atop a mermaid Eterne Turtleneck Maxi Dress -

In fact, this uniform was a hold-over from back before the AF was its own branch

Shine bright in this short sleeve long beaded silver formal dress CC0915 from Ladivine by Cinderella Divine

The principle of dressing in a way that is modern and festive while remaining appropriate is explored in this guide on the contemporary dress code, which speaks directly to the polished, wearable elegance an office party calls for

Allow the dressing to rest before using to give it time to thicken

Also, steer away from a mermaid-style dress that hugs your legs and look for one that allows you to walk easily across the sand to meet your groom