For clarification, my comment was, indeed, an attempt at a bit of humour, as highlighted by the emoticons, and linked to the word "termination" rather than what I think should have been "term" or "terminology".
"End of Day" was also often used in past years by various authors when referring to general "friggers" made by workers in their own time - such as the so-called "Nailsea" pipes, walking sticks etc. from the mid-19th century and later.
Another use of "end of day" was for the "Bottle Glass Dumps" made by the likes of Kilner Bros. These were often quite a sizeable chunk of green bottle glass containing basic "flowers in pots". There is still disagreement over whether they were made purely as "friggers" or were actually production items following a trend at the time. Maybe both explanations were true - and the ones made as "friggers", being in the workers so-called own time could have been made at the "end of the day" - but not necesarily with "left over glass at the end of the day's production work".