Wrong Date

I just noticed that the date on my front page is wrong. It has tomorrows date instead of today. I have my own server so the first thing I did was check the date on the server. It’s correct. Then I went into setting > general to check the date info. I found that it was set to UTC -7, which is not correct. I changed it to the correct setting by simply selecting Los Angeles on the drop down. Now the notation next to that item on the settings page has the correct time and date, but the front page still does not show the correct date. At this hour UTC date IS tomorrow. What is the chance that WP is picking up the UTC date instead of changing it to what it should be?