Learn Hardcore Korean: jumareneun jibeseo swieoyo.

주말 means “weekend,” and -에는 is a combination of the time particle -에 (“on/at”) plus the topic marker -는. Together 주말에는 literally means “as for weekends” or “on weekends” with a nuance of “when it comes to weekends….”

Can I just say 주말에 집에서 쉬어요 without -는?

Yes. Using only -에 still marks time (“on weekends”). The sentence 주말에 집에서 쉬어요 means the same thing (“I rest at home on weekends”), but it lacks the slight emphasis or contrast that -에는 gives (“as for weekends, …”).

What does 집에서 indicate?

집에서 is 집 (“home”) plus the location particle -에서, which marks where an action happens. So 집에서 means “at home” (the place where you rest).

Why is -에서 used with 집 instead of -에?

-에서 marks the place of an action (e.g., resting happens somewhere).
-에 marks a static location or destination (e.g., 집에 있어요 = “I’m at home”).
Since 쉬다 (to rest) is an action, you need 집에서 (“at home,” location of the action).

How is 쉬어요 formed and what does it mean?

쉬- is the verb stem meaning “to rest.”
-어요 is the polite present tense ending.
Put together, 쉬어요 means “(I/you/one) rest” in polite speech.

What level of politeness is 쉬어요, and can I adjust it?

쉬어요 is 해요체 (informal polite). You’d use it with strangers or people slightly older than you.
To be more casual with close friends: 쉬어.
To be more formal (e.g. in announcements): 쉬십니다.

Why is there no subject like “I” in 주말에는 집에서 쉬어요?

Korean often omits subjects when they’re clear from context (pro-drop). Here, “I” (저는) is understood. If you need to be explicit, you can start with 저는: 저는 주말에는 집에서 쉬어요.

What’s the usual word order in that sentence?

Korean follows a Subject–Time–Place–Object–Verb (S–T–P–O–V) pattern. In 주말에는 집에서 쉬어요 you have Time (주말에는), Place (집에서), then the Verb (쉬어요). The subject (저는/I) is simply omitted.