SYMPTOM:
In Strategy Web 9.4.1, the Date Selection widget displays the month, year, and days of the month, as shown below:

However, after upgrading to Strategy Web 9.4.1 Hotfix 6, the Date Selection widget does not display the days of the month and replaces the month and year with "UNDEFINED NAN", as shown below:

UNDEFINED NAN
CAUSE:
This is a known issue in Strategy Web 9.4.1 Hotfix 6.
ACTION:
This issue has been addressed in Strategy Web 9.4.1 Hotfix 7. Upgrade to take advantage of this fix.