Yes—that statement is faithful to Catholic liturgical teaching.

1) What the Church means by “Easter’s liturgical season”

In the Roman Rite, the period called “Easter Time” lasts fifty days, beginning on Easter Sunday and continuing until Pentecost Sunday, which is the conclusion of the season.1 2 3

The Church even describes these days as forming one prolonged celebration:

• “The fifty days from Easter Sunday to Pentecost Sunday are celebrated as one feast day” (the “great Sunday”).2

2) How this appears in the calendar

The Sundays within this fifty-day period are counted as follows: after Easter Sunday, the Church refers to them as the Second, Third, Fourth, Fifth, Sixth, and Seventh Sundays of Easter—because the Easter season itself is treated as continuing from Easter Sunday onward.1

Additionally, the first eight days are the Octave of Easter, celebrated with special solemnity (as “Solemnities of the Lord”).4

3) Why Pentecost is the “end point”

The season does not merely end with a new feast that is unrelated to Easter. Rather, Pentecost completes the Easter mystery by commemorating:

• the gift of the Holy Spirit to the apostles, and
• the beginnings of the Church and its mission to all nations.3

This is why Easter Time is understood theologically as a single unfolding of the paschal mystery—resurrection and its Spirit-given outpouring—culminating at Pentecost.3 5

Conclusion

So, Easter’s liturgical season lasts fifty days and concludes on Pentecost Sunday—with the whole period understood as one continuous celebration of the paschal mystery, prolonged until the Church’s Pentecost fulfillment.1 2 3