Many Muslims have heard of Ayyamul Bidh but are unsure what it means or why these days are special.
Ayyamul Bidh are among the most well-known Sunnah fasting days and provide an easy way to establish a regular fasting habit throughout the year.
What Does Ayyamul Bidh Mean?
Ayyamul Bidh (الأيام البيض) means “The White Days.”
The name refers to the 13th, 14th, and 15th days of each Hijri month.
These days are known for the brightness of the moon, which is nearly full during this period.
Why Do Muslims Fast on These Days?
Fasting on Ayyamul Bidh is a voluntary act of worship that many Muslims practice throughout the year.
It is considered one of the easiest and most consistent Sunnah fasting routines because it occurs every month.
Rather than waiting for specific seasons or occasions, Muslims have an opportunity to fast three days during every Hijri month.
When Are Ayyamul Bidh?
The dates change every month because they follow the Islamic calendar.
Ayyamul Bidh always falls on:
- 13th Hijri
- 14th Hijri
- 15th Hijri
Since the Hijri calendar is based on lunar months, these dates move throughout the Gregorian year.
Why Is It Difficult to Track?
Many people rely primarily on the Gregorian calendar in daily life.
As a result, they may not realize when the 13th, 14th, or 15th Hijri date arrives.
This is one reason why many Muslims use:
- Hijri calendars
- Islamic date widgets
- Islamic event reminders
- Fasting notifications
to stay aware of upcoming fasting opportunities.
Benefits of Tracking the Hijri Calendar
Even if you do not fast every month, staying aware of the Hijri date helps you prepare for:
- Ayyamul Bidh
- Ramadan
- Ashura
- Day of Arafah
- Islamic New Year
- Other important Islamic dates
A daily reminder can make it much easier to build consistency.
A Practical Solution
One of the easiest ways to remember Ayyamul Bidh is to keep the Hijri date visible every day.
When today’s Islamic date appears on your home screen, you naturally become more aware of upcoming fasting days without needing to check a calendar manually.
Many Muslims find that a simple Hijri widget helps them stay connected to the Islamic calendar throughout the year.
Final Thoughts
Ayyamul Bidh offers a simple and consistent opportunity for voluntary fasting every month.
Because these days follow the Hijri calendar, awareness is often the biggest challenge.
The more familiar you become with Islamic dates, the easier it becomes to recognize and prepare for these valuable opportunities before they arrive.