Art. 1.04 in the Collective Agreement reads:

For the purpose of interpretation of this Agreement, the following definitions will apply:
…
(c) Unless otherwise specified, a ‘day’ is a working day in the University’s Human Resources Division;
…

The following is specified for TA postings: 

• As per Article 11.02(a), TA assignments are posted for a min. of 10 working days or until 6 days prior to the start of the work assignment (except circumstances outlined in 11.02(b)). 

The following is specified for SL postings:  

• As per Article 11.02(a), SL assignments are posted for a min. of 15 calendar days or until 6 days prior to the start of the work assignment (except circumstances outlined in 11.02(b)).