In case this week's weather hasn't reminded you, it's December. And that means it's time for the annual Hayes Valley Holiday Block Party, happening tonight throughout the neighborhood.

Here are a few highlights:

• There will be a stage at Patricia's Green featuring live music from 6pm to 8:15pm, with a brass trio, a chorus, opera singers, and individual soloists keeping you entertained.
• The Hayes Valley Neighborhood Association will have a table at Patricia's Green where they'll dole out hot chocolate, cider, and cookies.
• Lavish (508 Hayes) will have a photo booth all night and spiked cider.
• Propeller (555 Hayes) will have custom pillow portraits, milk and cookies, and 11% off everything in the store.
• Fiddlesticks (540 Hayes) has popcorn, cider, face painting, and more.
• Cary Lane (560 Laguna) is offering 20% off everything in the store.

So put on your warmest coat, pray that the rain holds off, and get out there. Should be a fun night.