Comment 1 for bug 80120

Thank you for the bug report.

I think I know what causes it: PDFCalendarViewBase.daySubtitle returns a Unicode
object, and passes it directly to reportlab's Paragraph, which expects a UTF-8
encoded string. Boom!

Translated day names cause the bug; ASCII-only day names hide the bug -- this is
why the bug wasn't noticed during development.

See also issue 439 for more i18n bugs in pdfcal.py