In using time as a unit of comparison, it becomes immediately obvious that there are several ‘types’toconsider.Theseinclude(butarenotconfinedto)astronomicaltime,biologicaltime,geological time, andthetwomostsignificanttypesforthepurposesofthischapter:personaltimeandhistoricaltime. Despite the increasing intrusiveness of clocks andwatches, personal time is, in important ways, subjectiveandrelative,whetheroneisconsideringitasawholeandinrelationtoasenseofmaturation/ageing or in a more partial way, related to appointments,punctuality, the duration and sequence of lessons, a whole range of different ‘calendars’ (social, professional, family, recreational, etc.), and asense of busy-ness or stagnation.