1. every + day, week, month, year, etc.
“Every” is a determiner. It means “each”.
• Every day, I call my dad.
• Every morning, he has coffee.
• Every week, we have a test.
• I get paid every month.
• We take a camping trip every year.
2. everyday + noun
“Everyday” is an adjective. It means regular or usual.
• Eating vegetables is a good everyday habit.
• Running isn’t a special event. It’s just an everyday hobby.
• “Excellent” is an everyday word. I say it a lot.
• This isn’t an everyday problem. It’s very rare.