Sentence:  Sipping their coffee , discussing the weather , the <WSD>day</WSD> 's shopping , Fritzie 's commitments at the network ( all of which he would cancel ) , they avoided the radio , the morning TV news show , even the front page of the Santa Luisa Register , resting on the kitchen bar . 
Meaning of the word marked with <WSD> tags:  time for Earth to make a complete rotation on its axis