You can definitely forget your textbook for the next couple of weeks as there are several notable dates in the Calendar. WebEnglish.se has lesson materials for the following dates:
St Patrick’s Day March 17th (year 2-9)
Earth Hour March 19th (year 1-9)
International Day for the Elimination of Racial Discrimination March 21st (year 9)
Easter March 23-28 (year 1-9)
If these aren’t enough, there is also a theme page about Spring (year 1-6)