We based our lexical work on the classification of the lexical unit into fields determined by the semantic unit. Each field is, then, divided in to different semantic groups differ in containing lexical units collected on a base of comprehensiveness for the times of dinnar and dawn day. These basic divisions determine the structure of the classification adopted for the lexis of the time of the day. The study is submitted only for the lexis of language, giving an evidence for the richment of the language and its ability in expressing different times in the day within the same semaatic load, this shows the variance between specification and generalization in time usage in the same type, the same group, the same field, or between different fields. A degree of interaction appears in more than one field and more than one way through the deviation of the lexical unit which contributes in more than one time unit. The study also shows the value element possessed by the semantic unit in its relation with other lexes within the same semantic field or a group within the same field be attributed to a non-recognition.