打开手机微信，点击发现，点击小程序，点击右上角的搜索框，输入蜗牛传书，点击写一封信，点击守时小蜗右下角，输入要发送的时间，输入你要发送的消息，点击交给收信员，点击去通知收信人，选择你要发送的好友即可。具体操作如下：
1、打开手机微信，点击发现；
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2、点击小程序，点击右上角的搜索框，输入蜗牛传书；
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3、点击写一封信；
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4、点击守时小蜗右下角，输入要发送的时间；
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5、输入你要发送的消息，点击交给收信员；
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6、点击去通知收信人；
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7、选择你要发送的好友即可。
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注意事项：
微信本身是无法发送定时消息的，但我们可以使用蜗牛传书小程序实现定时消息的发送。