This enables you to change how Windows displays the long version of the date.
Control Panel/ Regional and Language Options/ Customize/ Date/ Long Date Format/
Try setting this to "d MMMM yyyy" as opposed to "dddd, d MMMM yyyy" and see if that makes any difference?
I am not sure if this works or not, if you want to disable the whole clock from showing try this registry tweak.
Remove Clock from system notification area
KEY: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
DWORD: HideClock = 1
Or do it from Group Policy.
User Configuration\Administrative Templates\Start Menu and Taskbar\ Remove Clock from the system notification area
Description:
Prevents the clock in the system notification area from being displayed.
If you enable this setting, the clock will not be displayed in the system notification area.
If you disable or do not configure this setting, the default behavior of the clock appearing in the notification area will occur.