The winter holidays are festive times with many different types of events such as Christmas, Hanukkah or new years parties to attend. Each of these event types may have its own dress code (parties, get together, family gatherings, religious ceremonies), so its important to review the dress code for each event type. It's also important to check the location, as different settings (restaurant or family home) have different dress codes.
The following is a quick overview of appropriate business casual attire for each event type. These are general guidelines. Further information can be found in the information section or other advice articles:
Less formal occasions include holiday parties hosted by family and friend at family and friend's houses. More formal occasions include business/work holiday parties and new years eve events at restaurants/bars or clubs. Additionally, since it is winter, colors won tend to be darker with lighter colored khakis and chinos being avoided.
It's usually colder out during the winter, so a sport coat can be great to have
For cold weather, sweaters can be a stylish addition
Dress appropriately for the location of the event