Advice to those who doubt the Hijri calendar

Question:
What is your advice for those who say that the calendar used in this country is not accurate regarding abstaining from food and drink and breaking the fast?

Answer:
O people, these individuals have cast doubt among the people regarding many acts of worship. They have cast doubt in them regarding the Tarawih prayer, they have cast doubt in them regarding praying in congregation during the last ten nights, they have cast doubt in them regarding the calendar, the timing of the prayer, and they have cast doubt in them regarding many matters. This is part of fitnah (trial, discord or temptation), and this truly indicates the ignorance of these people.
This Hijri calendar has been adopted since the era of King 'Abd al-'Aziz (may Allah have mercy on him). Generations have succeeded one another, the scholars have looked into it and scrutinized it, and they did not find any error in it. It was presented to specialized committees in various places, and they did not find any error in it, except for these people who found the error.
It is obligatory that these people not be paid any attention, because their task is to cast doubt, to point out errors in what people are doing, so that they appear to the people as scholars and as those who understand, and that the people are not knowledgeable and are not on the right path. This is their intention. Yes.