Official KHGT Muhammadiyah API

The Official Calculation System of
Muhammadiyah
— One API, One Global Calendar.

A learning and exploration platform for KHGT methodology. Contemporary hakiki hisab, interactive calendar, prayer schedules, and API documentation — all in one unified system.

Open KHGT Calendar Methodology & API
5°
min. geocentric crescent altitude
8°
Minimum elongation
1
Single global mathlak
UT
Universal day boundary 00:00 UT
Foundation

What you need to understand about KHGT

01

What is KHGT Muhammadiyah?

A Global Unified Hijri Calendar (KHGT) calculated by the Majelis Tarjih dan Tajdid of PP Muhammadiyah — aiming to unify the days and dates for Muslims worldwide on a scientific and jurisprudential basis.

02

Its scientific and jurisprudential foundation

Two pillars at once: shari'a evidence on time indicators and modern astronomy — precisely computing conjunction, altitude, and elongation.

03

Why it must be studied carefully

Many only remember 5° and 8°, yet KHGT also encompasses the concept of a universal day, single global mathlak, prohibition of anticipating conjunction, and the PKG2 mechanism.

Methodology Summary

Five things to understand before evaluating KHGT results

This system is more than two numbers — it is a complete global calendar methodology.

1
Hisab takes precedence for the calendar
Astronomical calculation allows the calendar to be predicted far in advance, enabling worship and social affairs to be aligned simultaneously.
2
Single global mathlak
The entire earth is viewed as one unified mathlak — the ultimate goal is one identical date worldwide.
3
Geocentric parameters
Minimum elongation of 8° and minimum geocentric crescent altitude of 5° at sunset.
4
Universal day boundary 00:00 UT
The calendar day change is not anchored to a specific location but to the universal boundary of 00:00 UT for all time zones.
5
PKG1 and PKG2
PKG1 if parameters are met before 24:00 UT. PKG2 opens alignment with conditions related to the Americas and New Zealand.
KHGT vs Turkey

Why often called similar, yet insufficient to simplify as merely a "Turkish version"

Visibility criteria reference the 2016 Turkey Congress, particularly the 8° elongation and 5° crescent altitude thresholds.

However, Muhammadiyah's guidelines frame those criteria within a complete system: single global mathlak, contemporary hakiki hisab, universal day change, no-anticipation-of-conjunction rule, and the PKG2 mechanism.

More accurately: Muhammadiyah adopts the Turkey 2016 visibility parameters, then situates them within the more comprehensive KHGT guidelines grounded in jurisprudence and astronomy.

KHGT vs MABIMS

Differences from local or regional approaches

The key difference is not merely numerical parameters but the calendar framework itself. KHGT targets one day one global date; local models still accept the possibility of inter-regional differences.

Two systems can both be scientifically sound yet produce different dates. The difference lies in mathlak scope, lunar visibility transfer rules, and the global time boundary used to begin the month.

A difference in dates does not always mean a calculation error — often what differs is the calendar methodology chosen from the outset.

Explore the platform

Annual Calendar

Browse the beginning of Hijri months and the active calendar mode.

Open calendar

Prayer Schedule

Connecting KHGT dating with daily worship needs.

Check times

Docs & API

Official endpoint guide for the KHGT system for education and integration.

Open docs
System commitment

One complete place to understand KHGT Muhammadiyah.

Methodology, calendar, prayer schedules, and API available in one platform — no need to switch to another source.