A two-minute silence is to be held on 7 July to mark the first anniversary of the London bombings that killed 52 people, Tessa Jowell has announced.
A memorial is to be built in Tavistock Square where a bus exploded
The national silence, at noon, is to be followed by a memorial event in the capital's Regent's Park.
The culture secretary also announced plans for a permanent memorial to be built in Tavistock Square, where one of the four bombs exploded on a bus.
The memorial is to be designed in consultation with victims' families.
Ms Jowell said: "The terrorist attacks in London last July were a dark hour in our history.
"They left 52 grieving families and hundreds of people injured. The lives of many of those caught up in the atrocity will never be the same again."
She said the two-minute silence would bring the nation together in tribute to those who died.
"We will remember the loss of the bereaved families, the suffering of the injured and all those who selflessly aided them," she said.
"The silence, the permanent memorial and the commemoration will give us all a way to remember the dead and give a voice to what is still unutterable grief."
The open air commemorative event will take place in Regent's Park's Queen Mary's Gardens.
Names read out
Participants will include the bereaved relatives, some of the hundreds of people injured by the bombs and ordinary Londoners.
The centrepiece of the event will be the reading aloud of the names of the 52 people killed.
John Falding, who lost his partner Anat Rosenberg in the bombings, said: "It was a very full consultation with suggestions from the government and plenty of space for our own ideas.
"What they announced today reflects very strongly the points I made so I'm extremely pleased."
The ceremony in Queen's Gardens will be the first time Mr Falding returns to the spot where he and his wife spent the evening before she died, at an open-air concert.
'Not to dwell'
Craig Cassidy, a paramedic who was one of the first on the bomb scene at Aldgate on 7 July told BBC News the remembrance plans were appropriate and he would take part in a two minutes silence.
"For the people that want it to be remembered, it should be," he said, adding "But you've got to be careful not to dwell on it to much, or the people who did it will have had more of an effect that even they would have imagined.
The permanent memorial in Tavistock Square will be created in a specially-designed garden on the side of the square nearest the place where a double-decker bus exploded on 7 July.
More than 770 people were injured and 52 killed when four suicide bombers set off bombs on London's transport system in the morning rush hour on 7 July 2005.