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ee.Date.getRelative
使用集合让一切井井有条
根据您的偏好保存内容并对其进行分类。
返回此日期相对于较大单位的指定（从 0 开始）单位，例如，getRelative('day', 'year') 会返回一个介于 0 和 365 之间的值。
| 用法 | 返回 |
|---|
Date.getRelative(unit, inUnit, timeZone) | 长 |
| 参数 | 类型 | 详细信息 |
|---|
this：date | 日期 | |
unit | 字符串 | 可以选择“月”“周”“天”“小时”“分钟”或“秒”。 |
inUnit | 字符串 | 可以选择“年”“月”“周”“日”“小时”或“分钟”。 |
timeZone | 字符串，默认值：null | 时区（例如，'America/Los_Angeles'）；默认为世界协调时间 (UTC)。 |
示例
Code Editor (JavaScript)
var date = ee.Date('2021-4-30T07:15:31.24');
print('0-based month of year', date.getRelative('month', 'year'));
print('0-based week of year', date.getRelative('week', 'year'));
print('0-based day of year', date.getRelative('day', 'year'));
print('0-based day of month', date.getRelative('day', 'month'));
print('0-based minute of day', date.getRelative('minute', 'day'));
print('0-based second of minute', date.getRelative('second', 'minute'));
// 0 is returned when unit argument is larger than inUnit argument.
print('0-based year of month (bad form)', date.getRelative('year', 'month'));
Python 设置
如需了解 Python API 以及如何使用 geemap 进行交互式开发，请参阅
Python 环境页面。
import ee
import geemap.core as geemap
Colab (Python)
date = ee.Date('2021-4-30T07:15:31.24')
display('0-based month of year:', date.getRelative('month', 'year'))
display('0-based week of year:', date.getRelative('week', 'year'))
display('0-based day of year:', date.getRelative('day', 'year'))
display('0-based day of month:', date.getRelative('day', 'month'))
display('0-based minute of day:', date.getRelative('minute', 'day'))
display('0-based second of minute:', date.getRelative('second', 'minute'))
# 0 is returned when unit argument is larger than inUnit argument.
display('0-based year of month (bad form):', date.getRelative('year', 'month'))
如未另行说明，那么本页面中的内容已根据知识共享署名 4.0 许可获得了许可，并且代码示例已根据 Apache 2.0 许可获得了许可。有关详情，请参阅 Google 开发者网站政策。Java 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC)：2025-07-25。
[null,null,["最后更新时间 (UTC)：2025-07-25。"],[[["\u003cp\u003e\u003ccode\u003eDate.getRelative()\u003c/code\u003e returns the 0-based position of a specified time unit (e.g., day, month) within a larger time unit (e.g., year, month).\u003c/p\u003e\n"],["\u003cp\u003eThe function takes 'unit', 'inUnit', and an optional 'timeZone' as arguments to define the relative position and time zone context.\u003c/p\u003e\n"],["\u003cp\u003eValid units include 'year', 'month', 'week', 'day', 'hour', 'minute', and 'second'.\u003c/p\u003e\n"],["\u003cp\u003eIf the 'unit' is larger than the 'inUnit', the function returns 0.\u003c/p\u003e\n"]]],[],null,["# ee.Date.getRelative\n\nReturns the specified (0-based) unit of this date relative to a larger unit, e.g., getRelative('day', 'year') returns a value between 0 and 365.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|------------------------------------------------|---------|\n| Date.getRelative`(unit, inUnit, `*timeZone*`)` | Long |\n\n| Argument | Type | Details |\n|--------------|-----------------------|---------------------------------------------------------------|\n| this: `date` | Date | |\n| `unit` | String | One of 'month', 'week', 'day', 'hour', 'minute', or 'second'. |\n| `inUnit` | String | One of 'year', 'month', 'week', 'day', 'hour', or 'minute'. |\n| `timeZone` | String, default: null | The time zone (e.g., 'America/Los_Angeles'); defaults to UTC. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\nvar date = ee.Date('2021-4-30T07:15:31.24');\n\nprint('0-based month of year', date.getRelative('month', 'year'));\nprint('0-based week of year', date.getRelative('week', 'year'));\nprint('0-based day of year', date.getRelative('day', 'year'));\nprint('0-based day of month', date.getRelative('day', 'month'));\nprint('0-based minute of day', date.getRelative('minute', 'day'));\nprint('0-based second of minute', date.getRelative('second', 'minute'));\n\n// 0 is returned when unit argument is larger than inUnit argument.\nprint('0-based year of month (bad form)', date.getRelative('year', 'month'));\n```\nPython setup\n\nSee the [Python Environment](/earth-engine/guides/python_install) page for information on the Python API and using\n`geemap` for interactive development. \n\n```python\nimport ee\nimport geemap.core as geemap\n```\n\n### Colab (Python)\n\n```python\ndate = ee.Date('2021-4-30T07:15:31.24')\n\ndisplay('0-based month of year:', date.getRelative('month', 'year'))\ndisplay('0-based week of year:', date.getRelative('week', 'year'))\ndisplay('0-based day of year:', date.getRelative('day', 'year'))\ndisplay('0-based day of month:', date.getRelative('day', 'month'))\ndisplay('0-based minute of day:', date.getRelative('minute', 'day'))\ndisplay('0-based second of minute:', date.getRelative('second', 'minute'))\n\n# 0 is returned when unit argument is larger than inUnit argument.\ndisplay('0-based year of month (bad form):', date.getRelative('year', 'month'))\n```"]]
