The Queen and High Queens will be attending an event at the Royal Albert Hall on Saturday, the eve of the ceasefire.
The annual Festival of Remembrance in London, reminiscent of the war dead, will feature performances by Sir Tom Jones and Sheridan Smith.
It comes before the Remembrance Sunday on November 11, which this year is 100 years after the end of the First World War.
Meanwhile, the Duke of Sussex had set up a wreath in Twickenham before the English rugby test match against New Zealand.
Prince Harry was escorted by New Zealand Prime Minister Winston Peters to wrap their wreaths before the Last Post was played and the spectators turned to a minute of silence.
The prince also met the descendants of two former English captains who died in the war.
On Saturday, a candlelight vigil takes place at the National Memorial Arboretum.
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Thanks to the Festival of Remembrance
The concert at the Royal Albert Hall will also feature Prime Minister Theresa May and the Dukes of Cambridge and Sussex.
It was organized by the Royal British Legion, an armed organization, as a "thank you to all who served our world, sacrificed and changed" and will be broadcast on BBC One on Saturday at 20:30 GMT.
The concert will also include performances by Welsh singer Bryn Terfel and former McFly stars Tom Fletcher and Danny Jones, who will deliver a song to mark the 100th anniversary of the RAF.
British cellist Sheku Kanneh-Mason, who won the BBC Young Musician of the Year in 2016, and the Kingdom Choir, who appeared at Prince Harry and Meghan's wedding, will also perform.
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The concert took place when French President Emmanuel Macron and German Chancellor Angela Merkel visited the city of Compiègne in northern France, where the Allies and Germany had signed the truce.
On Friday, Ms. May visited with the Prime Minister of Belgium and placed wreaths at the graves of the first and last British soldier killed in the war.
Later, she visited with Mr. Macron a cemetery from the 1st World War in France.
Poppy displays have been produced across the country, including a street called "Poppy Road" in Walsall and Hertford Castle.
What is planned for the ceasefire day on Sunday?
Sunday commemorates the centenary of the ceasefire worldwide.
In the UK, Pipers begin throughout the country at 6:00 am with Battle & # 39; s O & # 39; er – a traditional Scottish suit played at the end of the battle.
The Queen and senior royals will attend the national memorial service at London's Cenotaph at 11:00 GMT.
For the first time ever, a procession of 10,000 members of the public will pass the cenotaph where wreaths are laid.
London's Big Ben will also strike at Remembrance Sunday and take a break from ongoing renovations.
Services also take place elsewhere in the country, including Edinburgh, Glasgow, Cardiff, Belfast and Chichester.
In the evening, 1,000 Buglers sound the Last Post at locations across the country before 1,000 beacons are illuminated to mark a return to the light of tranquility.
More than 1,000 cathedrals and churches will be ringing simultaneously at 19:05.
The Queen and high-ranking members of the royal family also attend an evening service in remembrance of Westminster Abbey.