Six 7-week blocks: hexamesters, trimesters or semester (Northern hemisphere)
Period Weeks Term / Break Weeks Trimester Weeks Semester
W36/42 7 Fall term 1 15 (14+1) Fall trimester 24–25 (21+3∨4) Fall semester
W43 1 Fall half term break
W44/50 7 Fall term 2
W51/53 2–3 Christmas holiday
W01/07 7 Winter term 1 15 (14+1) Winter trimester
W08 1 Winter half term break 1 Winter holiday
W09/15 7 Winter term 2 24 (21+3) Spring semester
W16/17 2 Easter holiday
W18/24 7 Spring term 1 15 (14+1) Spring trimester
W25 1 Spring half term break
W26/32 7 Spring term 2
W33/35 3 Summer holiday
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