tonight, today, this week/month/year	that night, that day, that week/month/year
now	then, at the time, at once, immediately
yesterday, last night/week/month/year	the day before, the previous night/week/month/year
tomorrow, next week/month/year	the following day/the day after, the following/next week/month/year
two days/months/years ago	two days/months/years before