Breakdown of ashita wa mise ga yasumi desu.
Questions & Answers about ashita wa mise ga yasumi desu.
Because 明日 is a time word, and many common time expressions can be used without に.
So 明日は is natural and means as for tomorrow.
Some time words often appear without に, such as:
- 今日
- 明日
- 昨日
- 毎日
If you added に, it would usually sound unnatural here.
