Maggie called in sick yesterday (tomorrow)
She will call in sick tomorrow
He changed his phone to flight mode yesterday. (tomorrow)
He will change his phone to flight mode tomorrow
They had a conference call between the family last Sunday. ( next Sunday)
They will have a conference call between the family next Sunday
Beth was introduced to Robert last month. (next month)
Beth will be introduced to Robert next month
They decided it a month ago. ( in a month)
They will decide it in a month
We video chatted last weekend. (next week)
We will video chat next week