The error has increased considerably of late years, and ought to be corrected to some extent. This can be done most conveniently by placing three yet-ngin instead of two in the five watat between 1270 and 1283 B. E., thus
| Watat | Thandeikta | Proposed |
| 1272 | gyi | gyi |
| 1274 | ngè | ngè |
| 1277 | ngè | gyi |
| 1280 | gyi | ngè |
| 1282 | ngè | gyi |
126. If the tropical year be adopted, and the two initial corrections suggested in the last three paragraphs be made, viz. the solar year to commence at midnight of 7th—8th April every year and one extra yet-ngin to be inserted between 1270 and 1283, then the reformed calendar might conveniently commence from the first day of the tropical solar year 1281, 8th April 1919. The rules for compiling this calendar for a number of years are very simple.
127. (1) Divide Thagaj'it by 19. If the remainder be
| 1 | 4 | 7 | 9 | 12 | 15 | or | 18 |
the year has an intercalary month. This rule holds good until the year 1623 B. E.
(2). After B. E. 1623 the watat years in the Metonic cycle change as follows:—
| 9 changes to 10 in B. E. 1625 |
| 1 changes„ to„ 2 in„ B. E.„ 1978 |
| 12 changes„ to„ 13 in„ B. E.„ 2331 |
| 4 changes„ to„ 5 in„ B. E.„ 2684 |
| 15 changes„ to„ 16 in„ B. E.„ 3037 |
| 7 changes„ to„ 8 in„ B. E.„ 3390 |
(3). Mark all the watat for a number of years as above. Then divide them into periods of fifty years, commencing from 1281, thus,
| 1281 | — | 1330 |
| 1331 | — | 1380 |
| 1381 | — | 1430 |
and so on. Watat years are alternately wagyitat and wangètat, except that
(a) in each period of 50 years the first watat is wagyitat, and
(b) when the last watat of any 50 years is wangètat, then both the first and second watat of the next following 50 years are wagyitat.
