Samuel Johnson was evidently a January 6th kind of Twelfth Nighter, not a January 5th

 

 

Twelfth Night, or What You Will (to give the play its full title) was probably commissioned for performance as part of the Twelfth Night celebrations held by Queen Elizabeth I at Whitehall Palace on 6 January 1601 to mark the end of the embassy of the Italian diplomat, the Duke of Orsino. It was again performed at Court on Easter Monday in 1618 and on Candlemas night in 1623.     

More.

And more.

In the popular imagination at Shakespeare's time, the religious Separatist is about as low as the scurvy politician

And 't be any way, it must be with valour;

for policy I hate: I had as lief be a Brownist

as a politician.

 

-- William Shakespeare, Twelfth Night, Act 3, Scene 2

No blemish but the mind

 

 

In nature there's no blemish but the mind;

None can be call'd deform'd, but the unkind.

-- William Shakespeare, Twelfth Night, Or What You Will, Act III, Scene 4