וַֽיַּעֲשׂ֛וּ בַּיּ֥וֹם הַשְּׁמִינִ֖י עֲצָ֑רֶת כִּ֣י ׀ חֲנֻכַּ֣ת הַמִּזְבֵּ֗חַ עָשׂוּ֙ שִׁבְעַ֣ת יָמִ֔ים וְהֶחָ֖ג שִׁבְעַ֥ת יָמִֽים׃
And on the eighth day they held a solemn assembly; for they kept the dedication of the altar seven days, and the feast seven days.
Siddur Edot HaMizrach
The recitation of Hallel is performed standing up and on the first day of Chashod and the last six days of Pesach, there is no end to the recitation of Hallel. On the first day of Pesach (and abroad also on the Monday of Pesach), Shavuot, Sukkot, Shemini Atzeret, and Chanukah, a complete Hallel is recited with a blessing at the beginning and end.