Students will have an extra week of winter break before the start of spring semester next year, University Registrar Robert Doolos said in a broadcast e-mail sent Friday morning.As part of the revised academic calendar for the 2009-2010 school year, the first class of the spring semester will be the day after Martin Luther King Jr. Day — a week later than this year. Spring 2010 intersession will start later because of the change and will be the same length as winter and summer intersessions, according to the e-mail.Summer 2010 session B — the shorter session — was changed in the revised calendar to start at the same time as session A.”Beginning Session B later than Session A had a detrimental impact on enrollment in Session B courses,” Doolos said in the e-mail. Click here to see the revised calendar.——Contact Kyle Bove at [email protected]