Chronogram
Read a phrase as a year, the old way of hiding a date inside words.
The phrase's total is read as a year in the Islamic calendar, with the matching Western year beside it. That second figure is arithmetic, not a date: the Hijri year is about eleven days shorter than the Gregorian one, so a Hijri year overlaps two Western years and the conversion picks the one it mostly falls in. A chronogram gives you a year and never a day. Totals below about 1 or far above 1500 are not years at all — they are simply what the letters came to, and the page shows them rather than pretending the phrase failed.
Short phrases work best — a name, a title, a single line of verse. Long sentences produce totals far outside any plausible year and tell you nothing, because every letter adds and nothing subtracts. That arithmetic is the whole craft: composers wrote the phrase they wanted and then changed one word, or one letter, until the total landed on the year they meant. It is why the practice is described as hiding a date rather than recording one, and why a chronogram that scans well and lands exactly was worth commissioning.
Spelling decides the year, as it decides every number here. The same phrase written with ہ rather than ه, or with an alif the writer left out, moves the total and so moves the year — which is one reason two sources can date the same inscription differently. Settle the spelling you are working from before you trust the figure, and read the letter chips to see what was actually counted.
If you are reading a chronogram out of an old text rather than composing one, type it exactly as printed, including any word that looks redundant. Those are often the adjustment. And if you are composing, watch the total as you go: it is easier to reach a year by changing a short word near the end than by rewriting the line.