推荐回答（5个）
一甲子为60年
天干地支简称“干支”，取义于树木的干和枝
天干有十：甲、乙、丙、丁、戊（wù）、己、庚、辛、壬（rén）、癸（guǐ）； 地支十二：子、丑、寅、卯（mǎo）、辰（chén）、巳（sì）、午、未（wèi）、申、酉（yǒu）、戌（xū）、亥。 天干地支组合成如下六十个计时序号，作为纪年、月、日、时的名称，叫“干支纪年法”。
六十甲子顺序
1 ~10 甲子 乙丑 丙寅 丁卯 戊辰 己巳 庚午 辛未 壬申 癸酉 11~20 甲戌 乙亥 丙子 丁丑 戊寅 己卯 庚辰 辛巳 壬午 癸未 21~30 甲申 乙酉 丙戌 丁亥 戊子 己丑 庚寅 辛卯 壬辰 癸巳 31~40甲午 乙未 丙申 丁酉 戊戌 己亥 庚子 辛丑 壬寅 癸卯 41~50甲辰 乙巳 丙午 丁未 戊申 己酉 庚戌 辛亥 壬子 癸丑 51 ~60甲寅 乙卯 丙辰 丁巳 戊午 己未 庚申 辛酉 壬戌 癸亥
用六十甲子依次纪年，六十年一个轮回。干支纪年法的新一年由立春开始，公元纪年的一年以立春为界前后分属不同的干支纪年，这一点不熟悉的人容易搞错，应特别注意。
六十年，十天干，十二地支，轮回算的。
六十甲子纳音表
甲子 乙丑 海中金 丙寅 丁卯 炉中火 戊辰 已巳 大林木
庚午 辛未 路旁土 壬申 癸酉 剑锋金 甲戌 乙亥 山头火
丙子 丁丑 漳下水 戊寅 已卯 城头土 庚辰 辛巳 白腊金
壬午 癸未 杨柳水 甲申 乙酉 泉中水 丙戌 丁亥 屋上土
戊子 已丑 霹雳火 庚寅 辛卯 松柏木 壬辰 癸巳 长流水
甲午 乙未 砂石金 丙申 丁酉 山下火 戊戌 已亥 平地木
庚子 辛丑 壁上土 壬寅 癸卯 金薄金 甲辰 乙巳 覆灯火
丙午 丁未 天河水 戊申 已酉 大驿土 庚戌 辛亥 钗环金
壬子 癸丑 桑柘木 甲寅 乙卯 太溪水 丙辰 丁巳 沙中土
戊午 已未 天上火 庚申 辛酉 石榴木 壬戌 癸亥 大海水
60年，天干10个，地支12个，两个排序，取其最小公倍数60！
一甲子60年，比如现在，1984年（甲子鼠年）—2043年（葵亥猪年）是一甲子、
60年
天干地支组成六十个基本单位，甲子是其中的第一个，所以一般称60年为一甲子
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