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ee.Date.advance
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。
通过向给定日期添加指定单位来创建新日期。
用法 | 返回 |
---|
Date.advance(delta, unit, timeZone) | 日期 |
参数 | 类型 | 详细信息 |
---|
this:date | 日期 | |
delta | 浮点数 | |
unit | 字符串 | 可以选择“年”“月”“周”“日”“小时”“分钟”或“秒”。 |
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)
// Defines a base date/time for the following examples.
var BASE_DATE = ee.Date('2020-7-1T13:00', 'UTC');
print(BASE_DATE, 'The base date/time');
// Demonstrates basic usage.
print(BASE_DATE.advance(1, 'week'), '+1 week');
print(BASE_DATE.advance(2, 'years'), '+2 years');
// Demonstrates that negative delta moves back in time.
print(BASE_DATE.advance(-1, 'second'), '-1 second');
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)
# Defines a base date/time for the following examples.
BASE_DATE = ee.Date('2020-01-01T00:00', 'UTC')
display('The base date/time', BASE_DATE)
# Demonstrates basic usage.
display('+1 week', BASE_DATE.advance(1, 'week'))
display('+2 years', BASE_DATE.advance(2, 'years'))
# Demonstrates that negative delta moves back in time.
display('-1 second', BASE_DATE.advance(-1, 'second'))
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.advance()\u003c/code\u003e creates a new Date object by adding a specified amount of time to an existing Date.\u003c/p\u003e\n"],["\u003cp\u003eThe time units for advancement can be 'year', 'month', 'week', 'day', 'hour', 'minute', or 'second'.\u003c/p\u003e\n"],["\u003cp\u003eA positive \u003ccode\u003edelta\u003c/code\u003e argument moves the date forward in time, while a negative \u003ccode\u003edelta\u003c/code\u003e moves it backward.\u003c/p\u003e\n"],["\u003cp\u003eThe optional \u003ccode\u003etimeZone\u003c/code\u003e argument specifies the time zone for the calculation; it defaults to UTC if not provided.\u003c/p\u003e\n"]]],["The `Date.advance` function modifies a given date by adding a specified `delta` of time units. Units can be 'year', 'month', 'week', 'day', 'hour', 'minute', or 'second'. A negative `delta` subtracts time. An optional `timeZone` argument sets the time zone. It takes a date object, a float for `delta` and string for `unit` as arguments. The function returns a new Date object with modified time.\n"],null,["# ee.Date.advance\n\nCreate a new Date by adding the specified units to the given Date.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|-------------------------------------------|---------|\n| Date.advance`(delta, unit, `*timeZone*`)` | Date |\n\n| Argument | Type | Details |\n|--------------|-----------------------|-----------------------------------------------------------------------|\n| this: `date` | Date | |\n| `delta` | Float | |\n| `unit` | String | One of 'year', 'month', 'week', 'day', 'hour', 'minute', or 'second'. |\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\n// Defines a base date/time for the following examples.\nvar BASE_DATE = ee.Date('2020-7-1T13:00', 'UTC');\nprint(BASE_DATE, 'The base date/time');\n\n// Demonstrates basic usage.\nprint(BASE_DATE.advance(1, 'week'), '+1 week');\nprint(BASE_DATE.advance(2, 'years'), '+2 years');\n\n// Demonstrates that negative delta moves back in time.\nprint(BASE_DATE.advance(-1, 'second'), '-1 second');\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\n# Defines a base date/time for the following examples.\nBASE_DATE = ee.Date('2020-01-01T00:00', 'UTC')\ndisplay('The base date/time', BASE_DATE)\n\n# Demonstrates basic usage.\ndisplay('+1 week', BASE_DATE.advance(1, 'week'))\ndisplay('+2 years', BASE_DATE.advance(2, 'years'))\n\n# Demonstrates that negative delta moves back in time.\ndisplay('-1 second', BASE_DATE.advance(-1, 'second'))\n```"]]