anno Christi /krisˈtī or -tē/

In the year of Christ

anno Domini /anˈō domˈin-ī or -in-ē/

In the year of our Lord (also noun (informal) advancing old age)

anno mundi /munˈdī or mŭnˈdē/

In the year of the world (used in reckoning dates from the supposed time of creation)

anno regni /regˈnī or -nē/

In the year of the reign

anno salutis /sal-ūˈtis or -ooˈ/

In the year of redemption

anno urbis conditae /ûrˈbis konˈdit-ē or ŭrˈbis konˈdit-ī/

In the year of the founding of the city (ie Rome, 753BC)