The first date for the diary will be March 8 when schools will reopen and Brits can once again meet one friend or family member in an outside space for a picnic or a coffee.
Assuming all goes well with that easing, the next significant milestone will be March 29 when schools go on Easter Holiday.
The same date will also see the return on outdoor sports such as tennis, golf, basketball and even football. People will at this point no longer be legally required to remain at home unless absolutely necessary.
Boris said that no earlier than the April 12, step two of the reopening will begin but could be delayed if the earlier steps see a surge in infections.
At this point, hairdressers, beauty parlours, gyms, public libraries and holiday lets will reopen and pubs will be able to reopen serving customers outdoors.
No earlier than five weeks after April 12, phase three of the lockdown pubs, bars and restaurants will be able to begin serving customers indoors.
But the PM made clear that for each step to be taken, benchmark numbers will need to be met on Covid cases, hospital admissions, vaccinations and deaths.