Short answers, pulled from the story.
The Leningrad-Novgorod strategic offensive began on the 14th of January 1944 and ended on the 1st of March 1944, when Stavka ordered the Leningrad Front to a follow-on operation across the Narva River.
The siege of Leningrad lasted 900 days. Joseph Stalin declared it lifted on the 26th of January 1944, and the city celebrated that evening with a 324-gun salute.
Approximately 1,241,000 Soviet personnel were prepared for the offensive, compared to 741,000 German troops. The Red Army also positioned 21,600 standard artillery pieces, 1,500 Katyusha rocket guns, and 600 anti-aircraft guns along the front.
German forces suffered nearly 72,000 casualties during the offensive. They also lost 85 artillery pieces ranging in caliber from 15 cm to 40 cm and were pushed back between 60 and 100 kilometers from Leningrad to the Luga River.
Poor coordination between the 2nd Baltic Front and the Volkhov Front allowed the German command to transfer significant forces from the 16th Army to the Luga area, enabling the 18th Army to retain enough combat potential to avoid encirclement.
A total of 779 cities and settlements were liberated during the operation, including Novgorod, Luga, Mga, Tosno, Lyuban, Chudovo, Staraya Russa, Novorzhev, Dno, and Putoshka.