Constantinople (1081) — the same event in Anna Komnene and Epitome of Histories by Zonaras

Anna Komnene: On Good Friday (fourth indiction, April 6589), the Komnenian army entered Constantinople.; Epitome of Histories by Zonaras: Botaniates…

What each source says

Anna Komnene, The Alexiad · AD 1081 · Constantinople

On Good Friday (fourth indiction, April 6589), the Komnenian army entered Constantinople.

Now the day was Good Friday (the day on which we offer and feed upon our Mystical Passover) of the fourth “Indiction” in the month of April in the year 6589…
Location: Dawes 2.10 (문장 17)

Epitome of Histories by Zonaras · AD 1081 · Constantinopolis

Botaniates leaves the palace and enters the Peribleptos monastery, taking monastic dress; the Comneni enter the city unopposed

cuius post Romanum Argyrum imperatorem secundus conditor est vocatus, coma rasa mutata veste lacernam monasticam induit
Location: XVIII 21,7–20 · L2426

Place: Constantinopolis

Show on the map — open Anna Komnene, The Alexiad