Asr Time: Hanafi vs Standard Shadow Rule Explained

Asr is the one prayer whose start time comes from a shadow rather than from the sun's angle below the horizon. Two readings of that shadow rule have existed since the early centuries, and they produce Asr times that differ by anything from half an hour to well over an hour. If your app has an "Asr: Standard / Hanafi" setting, this is what it changes.

The rule itself

In the hadith of Jibril leading the prayers (Abu Dawud 393; Tirmidhi 149), Asr was prayed on the first day when the shadow of a thing equalled its length and on the second day when it equalled twice its length. In Sahih Muslim (612) Dhuhr is described as lasting until a man's shadow equals his height.

From these reports:

• Standard (majority) view: Asr begins when the shadow of an object equals its height, on top of whatever shadow it had at noon. Held by the Maliki, Shafi'i and Hanbali schools, by Abu Yusuf and Muhammad al-Shaybani among the Hanafis, and used by many Hanafi timetables.
• Hanafi view: Asr begins when the shadow equals twice the object's height, plus the noon shadow. This is the position reported from Abu Hanifa himself and is the standard in many Hanafi communities, especially in South Asia and Turkey.

The majority read the second day of Jibril's report as the end of Dhuhr and the start of Asr being one moment, so the one-length shadow belongs to Asr. The Hanafi reading keeps Dhuhr running until two lengths. Both readings are reasoned from the same texts, which is why neither side calls the other invalid.

Measuring it yourself

You can do this with a stick in a sunny spot.

1. At solar noon (the Dhuhr time on your timetable is close enough), mark the tip of the stick's shadow. That is the noon shadow.
2. Add the stick's height to that length for the standard Asr, or twice its height for the Hanafi Asr. Mark that distance from the stick's base.
3. When the shadow tip reaches your mark, Asr has begun by that rule.

For a 1 m stick in London on 8 February 2027, the noon shadow is about 2.3 m. Standard Asr is when the shadow reaches 3.3 m; Hanafi Asr when it reaches 4.3 m.

Real numbers

All times computed with our tool for the dates shown; Fajr and Isha methods do not affect Asr.

Two patterns stand out. The gap is smallest in winter and largest in summer everywhere. And at low latitudes such as Makkah, even winter gives a gap of about 50 minutes because the sun is still fairly high at midday.

Why the gap changes with season and latitude

A shadow's length is height × tan(zenith angle). When the sun is high (small zenith angle) the tangent changes slowly, so the sun must drop a long way for the shadow to grow from one length to two. When the sun is already low, as in a northern winter, the tangent changes fast and the two shadow lengths come within half an hour of each other.

Put the other way: in a London December the sun never gets higher than 15°, so the noon shadow is already 3.7 times the height, the standard Asr comes only 1 h 38 min after Dhuhr, and the Hanafi Asr 29 minutes later. In a London June the sun reaches 62°, shadows are short, and the two moments are over an hour apart.

Practical consequences

• Asr window length. Under the Hanafi rule the Asr window is shorter, since it still ends at sunset. In a northern winter the Hanafi Asr may begin only 1 h 45 min before Maghrib. Do not leave it late.
• Dhuhr window length. Under the Hanafi rule Dhuhr runs longer, which is useful at work or school when the earlier moment is awkward; see salah at work or school.
• Congregation. Masjids with mixed congregations often set the Asr iqamah after the Hanafi start so that everyone can join. That is one reason the mosque's Asr may be an hour later than your app; the mosque times vs apps article covers the rest.
• Ramadan. No effect on fasting; only the prayer time moves.

Disliked time at the end of Asr

Whichever rule you follow, the Prophet, peace be upon him, described leaving Asr until the sun has yellowed and is low as the prayer of the hypocrite (reported by Muslim). The last 15 to 20 minutes before sunset are better avoided for Asr, and the period from yellowing to sunset is one of the three disliked times; see forbidden prayer times.

Setting it in our tool

In the prayer times tool choose Asr: Standard or Asr: Hanafi under the method selector. The setting is remembered for the city pages and the printable timetable. If you share a timetable with a masjid, say which Asr rule it uses; both are valid choices, and the point is that everyone knows which one is printed.

Which rule to follow is a matter for your own school and community. Where you are unsure, ask a scholar or imam you trust rather than switching back and forth.