The hours of fasting in Ramadan vary based on the geographical position of the city where one lives. In some regions, the fasting hours might be extremely long while in other places it might be too short such that one wonders if the goal of fasting (Sawm) has been accomplished or not. Extended fasting might cause difficulties.

Some might complain that there is no advantage in fasting long days. Others might find excuses to avoid fasting altogether. But, Islam does not want Muslims to suffer. There are, therefore, some rulings on how to fast on very long days and very short days, that we review them all next.

Fasting in Ramadan on Extremely Short Days

In the case where the days are very short, one should perform fasting in its typical way, from dawn to sunset, according to the prayer times. Hence, short fasting hours does not change the default time rulings on fasting (Swam) [1].   

Fasting Is Not to Suffer

Fasting is not a mere act of depriving oneself of foods or drinks, but it aims at spiritual growth and salvation, inner peace, exercising patience, strengthening the social ties and experiencing how poor people live their lives [2].

Hence, the obligation on fasting is not to make people suffer; as it is stated in Surah Baqarah: “Allah intends for you ease and does not intend for you hardship” (2:185). So, there are some rulings on long fasts which make them less difficult.

Fasting in Ramadan on Very Long Days

Long fast (Swam), especially in hot summer days, is tough. In this case, one should fast according to the prayer times of his\her city of residence. But, if it is extremely difficult, whenever during the day he\she feels unable to continue, he\she is allowed to break the fast (Swam) and have to fast (it is obligatory, Wajib) later on for those missing (Qaza) fasts in shorter days of the current year and before the next Ramadan [1]

However, different religious experts (Mujtahids)  have different opinions on this matter. We explained one of those views above. There are two other opinions as follows and one of them might be the opinion of your religious expert (Mujtahid):

 In any case, one should fast according to the prayer times of the city of residence;
One should fast according to the prayer times in a “moderate region,” with the normal day length, that is on the same meridian as his\her city of residence.

Conclusion

Fasting is obligatory due to its spiritual and physical benefits. It is not to put pressure and make people suffer. If it is tough to fast in very long days, one can fast according to the rulings stated above. 

References:

1. Fasting in different country

If you feel you are not doing enough in your life and need to be a more productive Muslim, here we suggest some tips on planning a more productive lifestyle based on Islamic teachings. But before starting to review the tips on how to be a more productive Muslim, we should answer a "WHY" question? "Why do we want to or have to be more productive?" 

Merging into life routines can be hugely devastating for human beings. At the same time, many may not even recognize the fact that they are gradually being merged into their habits, and one day, they look back and look over their life, finding it all wasted. To avoid experiencing such hard and disappointing moments in life, Allah Almighty guides us through the Quran and the Islamic lifestyle provided in it. 

Islam's View on Life

Allah (SWT) introduces the ultimate goal of human creation as worshipping Him; "I did not create the jinn and the humans except that they may worship Me." (51: 56)

However, it is essential for human beings to understand the meaning of worshipping Allah (SWT). If, by glorifying Him, Allah (SWT) meant that people should spend all their time praying and fasting, then there was no need for all the other rulings and laws that the Quran describes regarding human beings' daily life including social, economic, political, etc. issues. 

The meaning of worshipping Allah (SWT) lies in the believers' understanding of the reason behind their behaviors and every single act and thought that they have; that is Allah Almighty's acceptance and satisfaction. It is crucial to keep in mind that worshipping Allah is not limited to praying and fasting, but every act of believers that is done in the way of gaining Allah's satisfaction is counted as worship.  That is why He recommends that all our deeds and actions should have a divine tint; "The coloring of Allah, and who colors better than Allah? And Him do we worship." (2: 138) 

Therefore, one can easily conclude that living an idle life is far from what Allah has expected from us. Allah (SWT) in the Quran encourages people not to waste even a single moment in their life when He says, "So when you are done, appoint, and supplicate your Lord." (94: 7 – 8)

The above verses show that for a more productive life, people should always have plans for their days, weeks, and years, so when they finish one task, they know what they should do next. Imam Musa al-Kazim (AS) says: "try that your daily time is divided into segments. One part for worshipping your Lord. One part for earning allowed (Halal) livelihood, a part for socializing with trustworthy friends, and another exclusively devoted to Lawful (Halal) pleasure with the family. [1]
We should still keep in mind that everything may not go exactly as we plan and not get disappointed if our plans do not go very well. Allah (SWT) says:

"Yet it may be that you dislike something, which is good for you, and it may be that you love something, which is bad for you, and Allah knows, and you do not know." (2: 216)

Therefore, keep a "to-do list" of your goals and plans for your years, months, weeks, and days. That will help you find less time in front of the TV, thinking that there is nothing else left to be done.

In the Quran, Allah counts some habits of those prosperous people. If we pay special attention to them, they help us have a more productive life. 

1- Those Who "Avoid vain talk" (23: 3) 

Vain talk does not necessarily apply to speaking to others. But any type of futile habit will take away one's prosperity, among which we can name unproductive use of social networks, useless friendships, ineffective discussions, etc.

 2- Those Who are Humble; "The servants of the All-beneficent are those who walk humbly on the earth" (25: 63)

Being humble and putting effort into reaching a humble character helps us be free from all useless social conflicts. Many people in human history wasted their lives looking abnormally beautiful or earning huge wealth. While the real prosperity belongs to those who beautify their soul, "Felicitous is he who purifies himself, celebrates the Name of his Lord, and prays. But you prefer the life of this world, while the Hereafter is better and more lasting." (87: 14- 17)

3- Those who ", and when the ignorant address them, they say, 'Peace!'" (25: 63)

Many people pay a lot of attention to their conversations with other people. So much that after each party or gathering, their mind is so busy analyzing what others told them and find out if they meant to humiliate or disrespect them. This habit takes a lot of energy from a person and prevents him/her from being a productive person. Therefore, Allah (SWT) suggests that if one wants to be a real servant of Him, he/ she should ignore all the things that may take away his concentration in serving Allah (SWT). 

4- Those who strive hard: "that nothing belongs to man except what he strives for" (53: 39)

There is nothing that people can not reach by their imagination and creativity. However, without effort and hard work, nothing is attainable. Through hard work, practice, and persistence human beings can gain what they plan for. Therefore, after planning for your life, and setting your goals that have a tint of God, you have to work hard and "… and once you are resolved, put your trust in Allah…" (3: 159) 

5. Eating and Sleeping Habits of a Productive Muslim

Allah also orders people to be careful about the health of their body and soul at the same time when He provides them with sleeping habits: "Stand vigil through the night, except for a little [of it], a half, or reduce a little from that, or add to it, and recite the Quran in a measured tone." (73: 2- 4) 

One may say that the above verses apply only to the Prophet (PBUH&HP), but whoever follows these habits will achieve high spiritual levels; "And keep vigil for a part of the night, as a supererogatory [devotion] for you. It may be that your Lord will raise you to a praiseworthy station." (17: 79) Studying the biography of great believers, one can realize that the night watch was one of the most explicit parts of their daily routine.

 Allah (SWT) also orders people to watch what they eat, as eating habits have a significant effect on the human body and soul: "Let man consider his food" (80: 24) Having a healthy body and soul will help people to be more productive. 

6. Reciting the Quran

One great habit that can help people have a more productive life, as recommended by Allah (SWT), is reciting the Quran: "…So recite as much of the Quran as is feasible. …" (73: 20)

Reading the Quran and contemplating over its stories, examples and even rulings can help us have a more creative and analytic mind, and this is aside from the miraculous impact that reciting the Quran has on human soul and body "We send down in the Quran that which is a cure and mercy for the faithful…" (17: 82) 

7. A Productive Muslim Takes Practical steps

In the Quran, Allah (SWT) has always put faith beside practice, which shows the importance of taking action instead of being passive human beings: "By time! Man is indeed in loss, except those who have faith and do righteous deeds, and enjoin one another to [follow] the truth, and enjoin one another to patience." (103: 1- 3) 

8. Remembering Death and Thinking of Hereafter

Imam Ali (AS), in his letter to his son, Imam Hasan (AS), says: "My son! Know that you were created for the Hereafter, not for this world, for extinction (in this world), not for permanence, and death, not for life. You are in an abode from which you must depart, in a place from which you acquire your provisions, and on a path to the Hereafter." [2]

It is vital to keep in mind that we are not going to live in this world forever. We are here for a short time, and we need to prepare for the real life as mentioned in the Quran: "The life of this world is nothing but diversion and play, but the abode of the Hereafter is indeed Life (itself), had they known!" (29:64). Therefore, if we live every moment of our life knowing that we are traveling to the real world any moment, then we will try our best to make the best out of our time, energy, and talents.

 In sum, having a more productive life is a necessity for all Muslims, and to improve one's productivity, planning a life based on the Quran and Islamic teachings can be a great guideline. 

References: 

1. Ibn Shu’bah ,Tuhaf al-Uqul, P. 409-410. 
2.  Allamah Sharif Razi,Nahj al-Balaghah, letter 31.