Leo Greetings Card by Annette Fry

Be aware that the cusp boundaries (which is to say, the exact point when the sun moves from one sign to the next) are not consistent - they don't stay the same from year to year.

If you are in doubt over your own, or anyone else's, sun sign, check with a reliable astrological website. The best one I know of is astrodienst.com. You will need to know exactly where and when a person was born, but take it from me that their free charts are totally excellent. Sorry, that was a bit Bill and Ted, wasn't it? But it doesn't alter the fact, they're the people to check with.