おはようございます。

Ohayō gozaimasu.

Good morning.

Word for word

“It is early (and that is honourable).”

Politeness: Polite

です/ます style. The safe default with strangers, shop staff and colleagues.

When you would say it

Before about 10 a.m. to neighbours, shop staff and colleagues.

Worth knowing

Many workplaces use it for the first meeting of the day at any hour, even in the evening in some trades.