What to wear to a birthday party as a guest can depend on a few factors, including the formality of the party, the time of day, the venue, and the preferences of the host. Here are some general guidelines to help you decide what to wear:

Consider the Dress Code: Check if the birthday party has a specified dress code, such as casual, semi-formal, formal, or themed attire. The invitation or communication from the host may provide clues.

Time of Day: Daytime parties typically call for more casual attire, while evening parties might require slightly dressier outfits. For a daytime party, consider wearing a sundress, casual slacks, or a nice skirt. For an evening party, opt for a cocktail dress or smart-casual attire.

Venue: The location of the party can influence your choice of clothing. For a party at someone's home, you might be able to go with more relaxed attire, while a party at a fancy restaurant or event venue might require a more formal outfit.

Theme: If the birthday party has a specific theme, consider incorporating elements of the theme into your outfit. This can make you feel more connected to the celebration and show your enthusiasm.

Your Personal Style: Choose an outfit that you feel comfortable and confident in. Your personal style and comfort are important factors in making you feel at ease during the party.

Accessories: Accessories can elevate your outfit. Consider adding jewelry, a scarf, a belt, or a tie to complement your clothing.

Footwear: Select appropriate shoes based on the formality of the party and the venue. Flats or casual shoes may work for a backyard barbecue, while heels or dress shoes might be better for a more formal gathering.

Weather: Check the weather forecast and dress accordingly. Bring a jacket or layers if the weather is uncertain.

Colors: Bright and cheerful colors are often a good choice for a birthday party, but feel free to choose colors that suit your personal style and the theme of the party.

Be Respectful: When in doubt, it's better to be slightly overdressed than underdressed, as it shows respect for the host and the occasion.

Ultimately, the key is to strike a balance between looking presentable and adhering to any specific requirements, while also being mindful of your comfort and personal style. If you're unsure about what to wear, don't hesitate to reach out to the host or a fellow guest for advice.