No, 1998 is not a leap year. The next leap year is 2024.

The last leap year was 2022. It was 366 days in 2022.

If you counted all the days in a calendar from January to December in an ordinary year, you'd get 365 days. However, February has 29 days every four years (with some exceptions) instead of 28. The year consists of 366 days. This is referred to as a leap year.

A leap year has 366 days.

Is 1992 a leap year? | Yes 1992 is a leap year |

Is 1996 a leap year? | Yes 1996 is a leap year |

Is 2000 a leap year? | Yes 2000 is a leap year |

Is 2004 a leap year? | Yes 2004 is a leap year |

Is 2008 a leap year? | Yes 2008 is a leap year |

Is 2012 a leap year? | No 2012 is not a leap year |

Is 2016 a leap year? | Yes 2016 is a leap year |

Is 2018 a leap year? | No 2018 is not a leap year |

Is 2021 a leap year? | No 2021 is not a leap year |

Is 2022 a leap year? | No 2022 is not a leap year |

Is 2023 a leap year? | No 2023 is not a leap year |

Is 2024 a leap year? | Yes 2024 is a leap year |

Is 2025 a leap year? | Yes 2025 is a leap year |

Is 2026 a leap year? | Yes 2026 is a leap year |

Is 2027 a leap year? | Yes 2027 is a leap year |

Is 2028 a leap year? | Yes 2028 is a leap year |

Is 2100 a leap year? | No 2100 is not a leap year |

1904, 1908, 1912, 1916, 1920, 1924, 1928, 1932, 1936, 1940, 1944, 1948, 1952, 1956, 1960, 1964, 1968, 1972, 1976, 1980, 1984, 1988, 1992, 1996, 2000, 2004, 2008, 2012, 2016, 2020, 2024, 2028, 2032, 2036, 2040, 2044, 2048, 2052, 2056, 2060, 2064, 2068, 2072, 2076, 2080, 2084, 2088, 2092, 2096, 2104, 2108, 2112, 2116, 2120, 2124, 2128, 2132, 2136, 2140, 2144, 2148, 2152, 2156, 2160, 2164, 2168, 2172, 2176, 2180, 2184, 2188, 2192, 2196, 2204, 2208, 2212, 2216, 2220, 2224, 2228, 2232, 2236, 2240, 2244, 2248, 2252, 2256, 2260, 2264, 2268, 2272, 2276, 2280, 2284, 2288, 2292, 2296, 2304, 2308, 2312, 2316, 2320, 2324, 2328, 2332, 2336, 2340, 2344, 2348, 2352, 2356, 2360, 2364, 2368, 2372, 2376, 2380, 2384, 2388, 2392, 2396, 2400, 2404, 2408, 2412, 2416, 2420, 2424, 2428, 2432, 2436, 2440, 2444, 2448, 2452, 2456, 2460, 2464, 2468, 2472, 2476, 2480, 2484, 2488, 2492, 2496, 2504, 2508, 2512, 2516, 2520, 2524, 2528, 2532, 2536, 2540, 2544, 2548, 2552, 2556, 2560, 2564, 2568, 2572, 2576, 2580, 2584, 2588, 2592, 2596, 2604, 2608, 2612, 2616, 2620, 2624, 2628, 2632, 2636, 2640, 2644, 2648, 2652, 2656, 2660, 2664, 2668, 2672, 2676, 2680, 2684, 2688, 2692, 2696, 2704, 2708, 2712, 2716, 2720, 2724, 2728, 2732, 2736, 2740, 2744, 2748, 2752, 2756, 2760, 2764, 2768, 2772, 2776, 2780, 2784, 2788, 2792, 2796, 2800, 2804, 2808, 2812, 2816, 2820, 2824, 2828, 2832, 2836, 2840, 2844, 2848, 2852, 2856, 2860, 2864, 2868, 2872, 2876, 2880, 2884, 2888, 2892, 2896, 2904, 2908, 2912, 2916, 2920, 2924, 2928, 2932, 2936, 2940, 2944, 2948, 2952, 2956, 2960, 2964, 2968, 2972, 2976, 2980, 2984, 2988, 2992, 2996

To know if a year is a **leap year**, it has to be entirely divisible by 4, with the exception of years entirely divisible by 100: these have to be also entirely divisible by 400.

year *mod 4 ≡ 0 *AND year *mod 100 ≢ 0*

OR

year*mod 100 ≡ 0* AND year *mod 400 ≡ 0*

OR

year

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