This has probably been asked but this is just annoying is there any program I can use and not a widget that will display the current date number?
I'm not sure I understand your question. Real time info on your home screen, like today's date in the calendar, is more or less the definition and purpose of a widget. There are many in the Play Store to do this, some associated with calendar apps (Business Calendar or aCalendar, for example) and some as stand-alone calendar widgets. But neither the Google Calendar nor the Samsung Calendar offers this feature.
Yes, exactly. Iphone doesn't call them widgets but that's what it is. The business calendar app has such a widget. Or Today widget. There are a fair number of these to choose from.
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Many icon packs have this ability. Just need to use another launcher like Nova.
I suppose, but I think its more apropos to call them 'dynamic app icons'. I will admit I do like having the date change on the iOS calender icon and the clock hands on the Clock icon. Are they technically necessary? No, but its still much easier than trying to make a 1x1 icon, not to mention it's much more consistent with the overall look. An Android widget doesn't really 'fit' a consistent icon theme.