He imitated the voice of the mu’adhdhin during Ramadan and his family broke their fast early, then he regretted it; what should he do?
Question

                last year during Ramadan I did a big mistake by trying to call adhan close to iftar time(like a joke)at home not in a masjid and unfortunately my mother and uncle both broke their fast by eating little before I informed them ,sincerely I regreted it but, I want to know whether I am to fast 60-60 for both if yes can I live the other 60 till after the next ramadhan? The reason I delayed asking was that I wanted a reliable and authentic source though I ask one great imam in a lecture but he responded to the question the day I didnt attend the lectures and neither of my colleagues heard the response.May Allah(SWT) continue help you with this great gigantic task!
Praise be to Allah.
    You did wrong 
    by imitating the voice of the mu’adhdhin at the time when the people were 
    waiting for the adhaan in order to break the fast; you should have respected 
    the importance of accuracy in timing for those who were fasting. 

    If you did 
    that with no intention of disrespect towards the adhaan or the fast, and 
    with no intention of deceiving those who were fasting, then you do not have 
    to do anything. But you do have to learn a lesson from that, which is how to 
    act appropriately in different situations, and that there is a time for 
    seriousness, at which it is not appropriate to engage in any kind of play or 
    fooling about. 

    But if you did 
    that to deceive them, so that they would break their fast (at the wrong 
    time), then you have to repent, seek forgiveness for what you did and regret 
    your actions. However, you do not have to offer expiation, whether that is 
    by fasting two consecutive months or otherwise. 

    With regard to 
    your mother and maternal aunt, there is no sin on them, because they broke 
    the fast thinking that the time for Maghrib had begun. 

    But do they 
    have to make up that day or not? There is a difference of scholarly opinion 
    concerning that; the majority are of the view that that day must be made 
    up. 

    However some 
    of the scholars favoured the view that it does not have to be made up and 
    the basic principle is that the duty has been fulfilled and there is nothing 
    in Islam to suggest that it must be made up in such cases, even though 
    something similar happened at the time of the Prophet (blessings and peace 
    of Allah be upon him). 

    This is the 
    view favoured by Shaykh al-Islam Ibn Taymiyah, and is also the view of 
    Shaykh Ibn ‘Uthaymeen (may Allah have mercy on him). 

    However, if a 
    person wants to be on the safe side with regard to his worship and to avoid 
    an area of considerable scholarly difference of opinion, and he makes up 
    that day, this is better, especially as making up one day is something easy, 
    and is not usually difficult for people. 

    Shaykh Ibn 
    Baaz (may Allah have mercy on him) said: 

    If a person 
    drinks, thinking that the sun has set, then the sun appears, then he should 
    make up that day according to the view that is regarded as correct by the 
    majority of scholars, and this is more on the safe side. Some of the 
    scholars do not think that it has to be made up, because he is excused as he 
    did not do that deliberately. However, the view that is more likely to be 
    correct is that it should be made up.

    End quote from 
    Fataawa Noor ‘ala ad-Darb by Ibn Baaz (Shuway‘ir compilation, 16/267 

    Please see 
    also the answers to questions no. 38543 and
    66155 

    And Allah 
    knows best.