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It moves around based on the year being approximately 365.25. Also, the sun and planets rotate around a common center (the barycenter), so the exact location of the sun can move around based on where Jupiter, Saturn, the planet of preteen giggles, and Neptune are in their orbit (the other planets are too small to have any noticeable effect).

Also, as the Earth's rotation and orbit precesses, we keep the calendar aligned with the seasons rather than the perihelion and aphelion, so they shift forward about a day every 58 years.

Year	Perihelion	Distance	Aphelion	Distance
2021	January 2, 2021 8:50 am	91,399,454 mi	July 5, 2021 6:27 pm	94,510,886 mi
2022	January 4, 2022 1:52 am	91,406,842 mi	July 4, 2022 3:10 am	94,509,598 mi
2023	January 4, 2023 11:17 am	91,403,034 mi	July 6, 2023 4:06 pm	94,506,364 mi
2024	January 2, 2024 7:38 pm	91,404,095 mi	July 5, 2024 1:06 am	94,510,539 mi
2025	January 4, 2025 8:28 am	91,405,993 mi	July 3, 2025 3:54 pm	94,502,939 mi
* All aphelion/perihelion times are in local Eastern time.