Indoor work, daily SPF and air-conditioned days mean sunlight alone rarely covers vitamin D needs, even in a sunny climate.
Both vitamins here are fat-soluble, so the meal you pair it with changes how much actually gets absorbed; eggs, avocado, olive oil or a handful of nuts all work well for absorption.
Magnesium is the third ingredient this pair depends on, since the body uses it to convert vitamin D into its active form, worth having in the routine if D3 is a priority.
Anyone on blood-thinning medication should speak with a healthcare provider first, since K2 plays a role in blood clotting.