Members of the Catholic faith have been encouraged to mark Ash Wednesday using online services and through prayer at home.
It follows the launch of the the #LivingLent initiative on social media by the Catholic Archbishop of Armagh and Primate of All Ireland Eamon Martin.
Ash Wednesday marks the beginning of Lent, the forty day penitential period leading to Holy Week and Easter.
Due to restrictions, ashes will not be received in Church buildings tomorrow.
However, small envelopes of blessed ashes will be available in some parish churches in the early days of Lent for individual prayer.
People will also be able to collect their Trócaire Box from parishes in the same way.
Instead of the usual ashes, Archbishop Martin has encouraged people to make Lenten promises tomorrow.
The message from Pope Francis for Lent 2021 is to "renew our faith, draw from the living waters of hope, and receive with open hearts the love of God".
English Cathedral finds novel way to mark Ash Wednesday
In Chichester, England the tradition of rubbing ash on the forehead of worshippers at the city's cathedral is being replaced with the ashes being sprinkled because of Covid-19 concerns.
In order to comply with Government rules, the congregation will not have the ash rubbed on to their forehead - instead the clergy will sprinkle it with their hands from a distance over the worshipper's head.
Other restrictions now in place during the cathedral's services include a limit on 40 people attending and the communion wafer being brought to the worshippers as they sit down and it being dropped into their hand rather than being placed.
All of the congregation at the service, which is being broadcast online, are also required to sit socially-distanced and to wear facemasks, with no congregational singing allowed.
The Dean of Chichester Cathedral, the Very Reverend Stephen Waine, said: "Chichester Cathedral remains open and we have made a number of changes to ensure our community can visit us safely at this difficult time - whether that be for prayer, reflection or for services.
"Ash Wednesday marks the start of Lent, an incredibly important time in the Church's calendar as we prepare for the Easter celebration.
"Although the numbers who can join us in person are restricted, we welcome hundreds of more people online through live-streamed services."
