What day is today? An inquiry into the process of time orientation.

In each of the 6 work days of a 2-week period, approximately equal numbers of passers-by were presented with the question "What day is today?" The experiment took place in Israel, using a total of 273 Ss. Average RT for the production of a correct response revealed a clear curvilinear relationship with the ordinal position of the day of the week, with longest RTs obtained with midweek target days. Errors revealed a similar curvilinear relationship, being most frequent in the middle of the week. These results are discussed in terms of the utilization of temporal landmarks (e.g., the Sabbath) in the process of time orientation. Additional data regarding the distribution of errors and Ss' introspective reports are presented and speculations regarding the mechanism involved are offered.