"But publication dates often provide important context!" Horsepuckey. You can, and should, make the strategic decision that you'll primarily write things which retain their value. (It takes approximately the same amount of work to create great writing which lasts versus creating great writing which ages quickly. Given the choice, unless you're the New York Times and your entire business is built around throwing out some of the world's best writing every day right after breakfast, you should choose to write things which last. After all, you don't write software with the explicit intention that it will suffer bitrot hours after release, now do you?)

If the context were truly important some of the time and not others, people would make the considered decision "Does this post need a publication date?", but nobody does that. Most writing only carries a publication date because that was inserted several years ago into the WordPress template by a designer. The designer likely knows nothing about your company, to say nothing of the instant work. He put in a date because WordPress makes it really easy and because everyone knows that blog posts have dates. He also probably made the decision to make the date front-and-center in the blog post, rather than treating it as minimal-impact metadata and burying it after the main text or putting it in a bots-only header.