HTML: Changing colors of specific words in a string of text

I have the below message (slightly changed):

"Enter the competition by January 30, 2011 and you could win up to $$$$ — including amazing summer trips!"

I have current have <p style="font-size:14px; color:#538b01; font-weight:bold; font-style:italic;"> formatting the text string, but want to change the color of "January 30, 2011" to #FF0000 and "summer" to #0000A0.

How do I do this strictly with HTML or inline CSS? (I'm working in Mailchimp)