Time series light curves in the unWISE W₁ band for all 56 sources in the calibration sample. Each panel shows the difference between the unTimely and the unWISE mean magnitude in the W₁ filter as a function of the observing date, demonstrating the photometric variability over the decade-long baseline. The shaded region indicates the inter-quartile range used for the variability quality cut. The source identification number in the top left of each subplot refers to Table A.2 and the symbol colors and shapes are those listed in Table 1.