Three Of A Kind | Turkey 20 Paras

Upon closer inspection and with greater understanding, I see that the three coins are not actually the same because they have 3 different regnal years. My question, with hiji years of 1223/23, 1223/25, and 1223/29, would the gregorian years be 1830 or 1829, 1832 or 1831, and 1852 or 1851, respectively? If the dates are 1829, 1831, and 1851, then I will assume the formula is the ascension year + the regal year - 1 year. Thanks.

Learned the answer on a different post by DCH, i.e., that the accession year is regnal year one. Thanks!