Do not, I repeat, DO NOT look up at the sun, even when it is partially blocked by the moon, without legit AF eclipse glasses. You will severely damage your eyes. According to NASA (we trust those guys), glasses should:
Have certification information with a designated ISO 12312-2 international standard
Have the manufacturer’s name and address printed on the product
Are less than three years old and don't have scratched or wrinkled lenses
If you can't get your hands on a pair of glasses, DIY a pinhole viewer. Here's a cute video how-to: