Further clarification:

We all know that it's generally recommended to fast throughout Muharram, but it may have been misunderstood from the 6 consecutive days highlighted in the previous poster that all are "extra special" days of fasting - which is true, except for the 11th of Muharram. That is why we sought to clarify by placing an 'X' on the 11th of Muharram; because the 11th is like any other ordinary day in Muharram, and not "extra special" like the remaining 5 days. However, it should not be misunderstood from this that a person should avoid fasting the 11th completely. NO! It's recommended to fast throughout Muharram, including the 11th, but you must not do so believing it to be as/more virtuous than the "extra special" days established in the authentic Sunnah.