Questions & Answers about Až se vrátím z práce, podívám se do zrcadla a dám si sprchu.
Here až means when / once, specifically with a future sense: once I get back from work...
A very useful rule is:
- až = when/once for a future point
- když = when in a more general sense, often for repeated situations, present facts, or past events
So:
- Až se vrátím z práce... = When I get back from work...
- Když se vracím z práce... = When I’m coming back from work / When I come back from work in a habitual sense
In everyday speech, Czech speakers do sometimes blur this a bit, but for learners, až is the safest choice for a one-time future event.