I will contribute to this because I find the tone respectful and collegial.
Most Christians fast, but they do not all fast at the same time. And there is a reason for it. There are several traditions in the Christian faith, shaped largely by how the faith developed over the many centuries that have passed. Even though all Christians share the same core set of beliefs, there are several differences in how the different faith traditions approach things including fasting.
There are the ancient churches (mostly Catholics and Anglicans, who themselves were offshoots of the Catholics) who observe fasting during the Lent season. And there are Pentecostal churches (these are the churches you find in PFN, Pentecostal Fellowship of Nigeria, whose current President is Bishop Francis Wale Oke). Pentecostals believe that Christians should fast as often as they can and in response to the directions of the Holy Spirit.
In fact, major pentecostal churches in Nigeria (RCCG, Winners Chapel, Deeper Life, MFM etc) fast for long seasons every year, but mostly at different times. In fact, RCCG fasts for 30, 50, 100 days depending on the specific instructions for the year. They are actually fasting now. The reason you will hardly find them speaking about it is that the Bible strongly discourages (almost forbids) all public shows of fasting.
So, Christians fast but they do not all do it at the same time. And when they do, they are most likely never to talk about it, except within their close circles.
90% of my colleagues back then in the bank were Christians, but only a handful, no more than 5 observe the Lent, they were all catholic.
I was also told that some fasting by some Christians are just avoiding meat.
There was also a friend who goes to winners that does normal fast a day in the week I forgot the particular day.
That was when I knew the lent is not like Ramadan that is compulsory to all Muslims unless if you have sickness you cannot fast.