Three Special Days: March 12, 13 and 14, 2021 – Palindromic Day, Perfect Square of Square and Pi Day

March 12, 21: Palindromic Day – 12321

March 13, 21: Perfect Square of Square – 130321 := 19⁴

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March 14, 21: 3.14.21 (American Style) – Pi Day

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References:

1. Inder J. Taneja, Palindromic, Patterned Magic Sums, Composite, and Colored Patterns in Magic Squares. Zenodo, February 2, 2019, pp. 1-99, http://doi.org/10.5281/zenodo.2555741
2. Inder J. Taneja, Perfect Square Sum Magic Squares, Zenodo, April 29, 2019, pp. 1-65, http://doi.org/10.5281/zenodo.2653927
3. Inder J. Taneja, Fractional and Decimal Type Bordered Magic Squares With Magic Sum 2020. Zenodo, January 20, 2020, pp.1-25, http://doi.org/10.5281/zenodo.3613698.
4. Inder J. Taneja, Fractional and Decimal Type Bordered Magic Squares With Magic Sum 2021, Zenodo, December 16, 2020, pp. 1-33, http://doi.org/10.5281/zenodo.4327333
5. Inder J. Taneja, Bordered Magic Squares With Order Square Magic Sums, Zenodo, January 20, 2020, pp. 1-26, http://doi.org/10.5281/zenodo.3613690.