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What would be great right now? (The answer is a phrase)!

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What would be great now is

a slice of pi.

It is coming soon

on the 14th of March, known as "Pi Day" because if one applies the degenerate and perverted convention used in the United States whereby dates are written month/day/year, that day is 3/14 and the decimal expansion of pi begins 3.14.

The diagram shows

the first however-many-it-is digits of pi, written in a clockwise spiral out from the centre, with prime digits (2,3,5,7) obscured in red and a slice of pi replaced with question-marks.

Thus:

            -----1---6---4---0---6-----
           /                           `.
          /  9---3---9---9---3---7---5   `.
         |   |                         \   `.
         8   6   6---2---6---4---3---3   1   |
         |   |   |                   |   |   |
     0   7   1   4   2---6---5---3   8   0   2
     |   |   |   |   |           |   |   |   |
     8   0   7   8   9   3---1   5   3   5   8
     |   |   |   |   |       |   |   |   |   |
     2   3   9   3   5---1---4   8   2   8   6
     |   |   |   |               |   |   |   |
     6   2   1   2---3---9---7---9   7   2   2
     |   |   |                       |   |   |
     |   9   4---8---8---2---0---5---9   0   |
      `.   \                           /    /
        `.   5---4---4---9---4---7---9    ,'
          `.                            ,'
            `----8---9---9---8---0-----'

A couple of further notes provided by OP in comments:

the digits are in a s-PI-ral, and those prime digits have been covered up with the primary colour red.

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  • $\begingroup$ Fantastic! This is the right answer. I hope this puzzle wasn’t too easy and you had fun solving it. $\endgroup$
    – PDT
    Commented Mar 10 at 4:55
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    $\begingroup$ Even if you use the excellent format YYYY-MM-DD, it's an appropriate name for the day. $\endgroup$
    – msh210
    Commented Mar 10 at 13:29
  • $\begingroup$ @msh210 what are your honest thoughts about this puzzle I would appreciate some feedback. I am not sure why this got downvoted. $\endgroup$
    – PDT
    Commented Mar 10 at 13:33
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    $\begingroup$ @msh210 True. I did wonder about mentioning that -- I'm a fan of the ISO8601 format myself -- but I'm pretty sure it's the dreadful US convention that's responsible for the name. $\endgroup$
    – Gareth McCaughan ♦
    Commented Mar 10 at 20:21
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    $\begingroup$ (And I don't think there's anything wrong with the puzzle. Occasional downvotes are just a fact of life.) $\endgroup$
    – Gareth McCaughan ♦
    Commented Mar 10 at 20:22

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