Timeline

Below is a timeline based on the events that happened in the series.

May 2018

 * May 3, 2018: The Catastrophe occurs, trapping 30,000 Japanese players inside the world of Elder Tale.
 * After meeting up at White-leaf Field, Shiroe and Naotsugu are caught by Maryelle and brought to the Crescent Moon Alliance's guild hall.
 * Hamelin begins "recruiting" new players.
 * Approximately five days later: First known death occurs (Soujiro in the West Wind Brigade manga). Rise in Player Killing occurs after it is proven that revival is possible.
 * Akatsuki joins Shiroe and Naotsugu.
 * Brigandia has taken control of Susukino.

June 2018

 * Shiroe's Party returns from Susukino.
 * The major battle guilds in Akihabara have divided up battle grounds, resulting in a reduction of PKing and a "falling into ranks" of different guilds.
 * Out of different groups that are all guilty of this, the Black Sword Knights and Silver Sword are particularly notable for their usage of EXP Pots to try and reach level 91. These EXP Pots are provided by Hamelin through abuse and manipulation of their low-level recruits.

July 2018

 * The Round Table Conference convenes for the first time.
 * With the exception of Silver Sword, all participants agree to the formation of the Round Table Alliance.
 * Nureha and Indicus, leaders of Plant Hwyaden, complete their take-over of Minami and Nakasu.

October 2018

 * The Libra Festival occurs for three days.
 * Lord Marves attempts to sabotage the event to discredit both Rayneshia and the Round Table Alliance, but is foiled.
 * Nureha meets up with Shiroe after the conclusion of the Festival before returning to Minami.

November 2018

 * Shiroe and Naotsugu join Silver Sword in Susukino in order to beat the Abyssal Shaft raid.
 * Tetora, who was sent by Kazuhiko, joins the raid and later, Log Horizon. Demiqas is forced by William Massachusetts to go along.
 * Akatsuki, Rieze, Nazuna, and others fight against a Royal Guard named Enbart Nelles, who mysteriously acquired a sword possessed by a Raid Boss, Lugrius.
 * The flavor text of Takayama Misa's weapon, Calamity Hearts, causes both Krusty and her right arm to disappear.

January 2019

 * The Abyssal Shaft Raid Party returns, successful. Shiroe, Naotsugu, and Tetora return to Akihabara.

May 2019

 * The Shibuya Raid Team is formed to stop the attack by the Eternal Moths, and is successful.
 * Contact is made with Kanami's Party in China.