Date Systems: Thailand
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Thai coins were not dated before 1874, and since have used three different dating systems.
Step 1
Thai dates are read from left to right and use Thai numerals. Using the table below, locate a series of three to four numerals. Most B.E. coins will have the date system characters before the number (see Step 2).
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
---|---|---|---|---|---|---|---|---|---|
๐ | ๑ | ๒ | ๓ | ๔ | ๕ | ๖ | ๗ | ๘ | ๙ |
Step 2
Determine the date system (era) by finding which range the number from Step 1 is included (more or less).
Characters | Date System | Number Range | Dates Used (AD) |
---|---|---|---|
จ.ศ. | Chula Sakarat (CS) | 1236 - 1244 | 1874 - 1882 |
ร.ศ. | Rattanakosin Sok (RS) | 106 - 129 | 1887 - 1910 |
พ.ศ. | Buddhist Era (BE) | 2458 & Up | 1915 - Present |
Step 3
Take the number from Step 1, and add the corresponding offset for the date system found in Step 2. See the examples below.
Characters | Thai Year | Conversion |
---|---|---|
๑ ๒ ๓ ๖ | CS1236 | 1236 + 638 = AD1874 |
๑ ๒ ๓ | RS123 | 123 + 1781 = AD1904 |
พ.ศ. ๒ ๕ ๔ ๘ | BE2548 | 2548 - 543 = AD2005 |