Once each year, on the anniversary of the night on which Jesus was betrayed, we should contemplate the meaning of Christ's death by the observance of the Passover service.
The Bible contains no record of the New Testament Church observing Easter or Lent during the time of the apostles, nor does it contain any direction for their observance.
For people who observe Easter it might come as a surprise to learn that Paul, the Apostle sent to the Gentiles, gave instructions to a mostly Gentile church in Corinth to keep festivals generally regarded as Jewish and not for Christians.