2018

In 2018, Ace bought a copy of NME outside Ladbroke Grove hypertube station. In it, the Seventh Doctor had placed a personal advert that read, "Ace - Behind You!". (PROSE: Timewyrm: Revelation)

Political structure
According to some accounts, by this time, Earth was politically divided into "zones" overseen by the World Zone Authority, a successor to the United Nations. A major challenge faced by the organisation was deteriorating environmental conditions and overpopulation. Nations were grouped into Zones answerable to a World President. Each Zone had its own Controller but a centralised security agency under a World Security Chief had jurisdiction over the whole body, and visas and passes were needed to move from zone to zone. (TV: The Enemy of the World)

Other accounts indicated this was not the case as Jack Robertson planned to contest Donald Trump as President of the United States in the 2020 election. (TV: Arachnids in the UK)

Dated events
In September, after falling from her TARDIS post-regeneration, the Thirteenth Doctor met Yasmin Khan, Ryan Sinclair, and Graham and Grace O'Brien. Together, they discovered that Stenza Tim Shaw had come to Earth to hunt a trophy, Karl Wright. He was defeated by the Doctor implanting DNA bombs into him. After he discovered this, he teleported back to his homeworld. Grace died after falling off a crane.

On Wednesday 14 September, a football match was played between Sheffield and Southport. Rahul had purchased a ticket with a price of £15.00 to attend this match with a seat in the Main Stand Upper Tier of Sheffield stadium.

The Doctor stayed around for Grace's funeral, after which she asked Graham, Yaz, and Ryan locate the TARDIS. Though the trio were meant to stay behind when she left, they teleported with the Doctor into deep space. (TV: The Woman Who Fell to Earth)

Undated events
The Second Doctor and his companions Jamie McCrimmon and Victoria Waterfield landed in Australia and became involved in Giles Kent's plot to overthrow the Doctor's double, Ramón Salamander. Salamander was a powerful figure involved in the global politics of this era. Around this time, parts of central Europe were devastated by volcanic eruptions. (TV: The Enemy of the World)

The Biodiversity Tower was built in London in 2018. (PROSE: Six Impossible Things Before Breakfast)

Taking Heather McCrimmon to a musical in New York City in 2018, the Doctor discovered the Gavulav, alien computer hackers, had infiltrated the New York Police Department so that they could fleece Earth's economy. The Doctor used a Gallifreyan counter virus to stop their schemes. (COMIC: The Greed of the Gavulav)

Alternate timelines
In an alternate future predicted by the Monks by 2018, in just one year, all life on Earth had been destroyed. (TV: The Pyramid at the End of the World)

In another alternate timeline, Ibrahim Hadmani was killed in a car crash in the first week of 2018. (PROSE: Auld Acquaintance)