Use Time Dilation to Calculate: What Year is It? on the Sun. It's Not Even Close to 2021

Job ID: 30713825

Budget: $250 – $750 USD

Using Albert Einstein's Mathematics to solve for the: Total, Separation in Time, between the Earth and the Sun.
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The Sun passes through 66.3 Seconds LESS TIME per year than the Earth. I want the "Best Answer" to the total time separation to date.
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I will award the project to the person that can demonstrate a method/means to do so, to include both Mass and Velocity induced Time Dilation. (Special and General Relativity)
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Methods:
Hand Calculations; Just the mathematical formulas , outline the variables and the solution process.
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Excel Spread Sheet: One that I can input data and it uses the formulas to do the calculations.
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Java Script, C++ or other Software: 'Must have transparent Source Code that I can verify it is correctly calculating.
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Thank you for reading this far, Good luck & Best Wishes