Function WEEKDAYNAME not listed
Steps to Reproduce:
User Profile Reset: No
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:55.0) Gecko/20100101 Firefox/55.0
Created attachment 135762 [details]
Thank you for the report.
The bug is similar to bug 108679. If you have time and want to help, you can assign the bug to yourself and follow the instruction for the bug 108679. Attach the resulting file here for insertion into the help system. If you have skills and credentials to patch the code directly, then the above mentioned bug is the way to do.
Otherwise, let us know and we handle this documentation when time permits.