с понедельника

since Monday; from Monday

→ с
phrase Uncommon #22,394
since Monday; from Monday Use “since Monday” for something that began Monday and is still ongoing, and “from Monday” for schedules or starting dates.
RU: Я работаю здесь с понедельника.
EN: I’ve been working here since Monday.

Я тут с понедельника.

I've been here since Monday.

Она перенесла встречу с понедельника на вторник.

She rescheduled the meeting from Monday to Tuesday.

Я не видел Тома с понедельника.

I haven’t seen Tom since Monday.

Я в Австралии с понедельника.

I've been in Australia since Monday.

Том тут не был с понедельника.

Tom hasn't been here since Monday.

Том с понедельника в Австралии.

Tom has been in Australia since Monday.

Вот у меня их сколько лежит с понедельника.

I have so many of them lying around since Monday.

— Нашествие варваров (2003)