A lot has happened since we found out Britain had voted to leave the European Union.
There's a lot to digest and take in, so we've put together a list of the day's key events so far.
1. David Cameron resigned.
He said Britain needed a new leader to steer the country to its new destination. He said there was no immediate rush to step down, but that he would like a new Prime Minister to be in place by the start of the Conservative Party conference in October. "I love this country and I feel honoured to have served it and I will do everything I can in future to help this great country succeed," he said.
2. Boris Johnson made a speech.
He paid his respects to David Cameron, but went on to say: "It is the essence of our case that young people in this country can look forward to a more secure and more prosperous future if we take back the democratic control that is the foundation of our economic prosperity."
3. Jeremy Corbyn's position looks precarious.
Two Labour MPs, Margaret Hodge and Ann Coffey, have submitted a vote of no confidence in Jeremy Corbyn.
The Labour leader responded by saying he was "absolutely staying". Even if the vote of no confidence is carried by a majority of Labour MPs, there is no requirement for Corbyn to resign - it merely adds more pressure on him to do so.
4. Markets reacted badly.
The pound dropped to its lowest level since 1985, whilst the FTSE 100 plunged and banks such as Barclays, Lloyds and RBS reported share value drops of 30%. The BBC reported that Morgan Stanley had started to move 2,000 of its London-based investment banking staff to Dublin or Frankfurt as a result of the vote.
5. Nigel Farage made an admission on the NHS pledge.
He said on Good Morning Britain that it was a "mistake" for the Leave campaign to say that the £350 million-a-week saving from being in the EU would be spent on the NHS.
6. Young people are angry.
Pre-referendum polling data suggests the overwhelming majority of young people voted to Remain in the EU, and it was mostly the older folk who pushed them into a decision they don't want. And whilst Scotland can push for a referendum, there's not much the young people can do to secede from the old.
7. The SNP said another referendum is 'highly likely'.
Scotland "sees its future as part of the EU", said SNP leader Nicola Sturgeon, as it emerged all 32 Scottish council areas backed Remain. She said it was "democratically unacceptable" for Scotland to be dragged out of the EU by England.
8. Sinn Fein called for a unified Ireland.
As the only UK country with an EU border, Northern Ireland's Deputy First Minister Martin McGuinness called for a border poll on a unified Ireland. Sinn Fein said the British government has "forfeited any mandate" to represent the economic or politic interests of Northern Ireland after the country favoured Remain.
9. The internet has gone wild
Petitions to hold a second referendum and to declare London independent from the UK have been gaining thousands of signatures all day. Meanwhile, Leave voters have been expressing their regret at voting on social media. Some said they didn't realise the impact a Leave vote would have, whilst others said they felt lied to by politicians just hours after the Leave vote was declared.