As you may have seen in my earlier post about my regular weekday schedule, my goal is to update this blog every day. Or is it everyday? Today’s tip is about keeping the two straight. I thought I had a novel mnemonic, but it turns out all the resources I checked promote the same trick. Oh well–at least that’s verification it works!

It’s as simple as this: if you can replace the phrase with “each day,” then you should use “every day.” As in, “I update the blog each day.” That checks out.

If substituting in “each day” doesn’t make sense, then you should instead use “everyday.” You wouldn’t say, for example, “Stacy’s each day look is drab,” so you should write, “Stacy’s everyday look is drab.”

For a good technical explanation, check out this entry from Grammarist.