diff --git a/themes/example/components/Footer.js b/themes/example/components/Footer.js
index 83a55193..08b9d561 100644
--- a/themes/example/components/Footer.js
+++ b/themes/example/components/Footer.js
@@ -4,13 +4,18 @@ import DarkModeButton from '@/components/DarkModeButton'
 export const Footer = (props) => {
   const d = new Date()
   const currentYear = d.getFullYear()
-  const startYear = BLOG.SINCE && BLOG.SINCE !== currentYear && BLOG.SINCE + '-'
+  const copyrightDate = (function() {
+    if (Number.isInteger(BLOG.SINCE) && BLOG.SINCE < currentYear) {
+      return BLOG.SINCE + '-' + currentYear
+    }
+    return currentYear
+  })()
 
   return <footer className="w-full bg-white px-6 border-t dark:border-hexo-black-gray dark:bg-hexo-black-gray ">
         <DarkModeButton className='text-center pt-4'/>
 
         <div className="container mx-auto max-w-4xl py-6 md:flex flex-wrap md:flex-no-wrap md:justify-between items-center text-sm">
-            <div className='text-center'> &copy;{`${startYear}${currentYear}`} {BLOG.AUTHOR}. All rights reserved.</div>
+            <div className='text-center'> &copy;{`${copyrightDate}`} {BLOG.AUTHOR}. All rights reserved.</div>
             <div className="md:p-0 text-center md:text-right text-xs">
                 {/* 右侧链接 */}
                 {/* <a href="#" className="text-black no-underline hover:underline">Privacy Policy</a> */}
diff --git a/themes/fukasawa/components/SiteInfo.js b/themes/fukasawa/components/SiteInfo.js
index fa342c0d..59a071a0 100644
--- a/themes/fukasawa/components/SiteInfo.js
+++ b/themes/fukasawa/components/SiteInfo.js
@@ -3,12 +3,18 @@ import BLOG from '@/blog.config'
 function SiteInfo ({ title }) {
   const d = new Date()
   const currentYear = d.getFullYear()
-  const startYear = BLOG.SINCE && BLOG.SINCE !== currentYear && BLOG.SINCE + '-'
+  const copyrightDate = (function() {
+    if (Number.isInteger(BLOG.SINCE) && BLOG.SINCE < currentYear) {
+      return BLOG.SINCE + '-' + currentYear
+    }
+    return currentYear
+  })()
+
   return (
         <footer
             className='leading-6 justify-start w-full text-gray-400 text-xs font-sans'
         >
-            <span> © {`${startYear}${currentYear}`} <span> <a href={BLOG.LINK} className='text-gray-500 dark:text-gray-300 '> <i className='mx-1 animate-pulse fas fa-heart'/> {BLOG.AUTHOR}</a>. <br /></span>
+            <span> © {`${copyrightDate}`} <span> <a href={BLOG.LINK} className='text-gray-500 dark:text-gray-300 '> <i className='mx-1 animate-pulse fas fa-heart'/> {BLOG.AUTHOR}</a>. <br /></span>
 
             {BLOG.BEI_AN && <><i className='fas fa-shield-alt' /> <a href='https://beian.miit.gov.cn/' className='mr-2'>{BLOG.BEI_AN}</a><br/></>}
 
diff --git a/themes/hexo/components/Footer.js b/themes/hexo/components/Footer.js
index 8ed3fcc3..2062c819 100644
--- a/themes/hexo/components/Footer.js
+++ b/themes/hexo/components/Footer.js
@@ -5,14 +5,20 @@ import DarkModeButton from '@/components/DarkModeButton'
 const Footer = ({ title }) => {
   const d = new Date()
   const currentYear = d.getFullYear()
-  const startYear = BLOG.SINCE && BLOG.SINCE !== currentYear && BLOG.SINCE + '-'
+  const copyrightDate = (function() {
+    if (Number.isInteger(BLOG.SINCE) && BLOG.SINCE < currentYear) {
+      return BLOG.SINCE + '-' + currentYear
+    }
+    return currentYear
+  })()
+
   return (
     <footer
       className='font-sans dark:bg-black flex-shrink-0 bg-hexo-light-gray justify-center text-center m-auto w-full leading-6  text-gray-600 dark:text-gray-100 text-sm p-6'
     >
       <DarkModeButton/>
 
-      <i className='fas fa-copyright' /> {`${startYear}${currentYear}`} <span><i className='mx-1 animate-pulse fas fa-heart'/> <a href={BLOG.LINK} className='underline font-bold  dark:text-gray-300 '>{BLOG.AUTHOR}</a>.<br/>
+      <i className='fas fa-copyright' /> {`${copyrightDate}`} <span><i className='mx-1 animate-pulse fas fa-heart'/> <a href={BLOG.LINK} className='underline font-bold  dark:text-gray-300 '>{BLOG.AUTHOR}</a>.<br/>
 
       {BLOG.BEI_AN && <><i className='fas fa-shield-alt' /> <a href='https://beian.miit.gov.cn/' className='mr-2'>{BLOG.BEI_AN}</a><br/></>}
 
diff --git a/themes/medium/components/Footer.js b/themes/medium/components/Footer.js
index c98dc6af..78354b1c 100644
--- a/themes/medium/components/Footer.js
+++ b/themes/medium/components/Footer.js
@@ -5,13 +5,19 @@ import DarkModeButton from '@/components/DarkModeButton'
 const Footer = ({ title }) => {
   const d = new Date()
   const currentYear = d.getFullYear()
-  const startYear = BLOG.SINCE && BLOG.SINCE !== currentYear && BLOG.SINCE + '-'
+  const copyrightDate = (function() {
+    if (Number.isInteger(BLOG.SINCE) && BLOG.SINCE < currentYear) {
+      return BLOG.SINCE + '-' + currentYear
+    }
+    return currentYear
+  })()
+
   return (
     <footer
       className='dark:bg-hexo-black-gray flex-shrink-0 justify-center text-center m-auto w-full leading-6 text-gray-400 text-sm p-6'
     >
        <DarkModeButton/>
-      <i className='fas fa-copyright' /> {`${startYear}${currentYear}`} <span><i className='mx-1 animate-pulse fas fa-heart'/> <a href={BLOG.LINK} className='underline font-bold text-gray-500 dark:text-gray-300 '>{BLOG.AUTHOR}</a>.<br/>
+      <i className='fas fa-copyright' /> {`${copyrightDate}`} <span><i className='mx-1 animate-pulse fas fa-heart'/> <a href={BLOG.LINK} className='underline font-bold text-gray-500 dark:text-gray-300 '>{BLOG.AUTHOR}</a>.<br/>
 
       {BLOG.BEI_AN && <><i className='fas fa-shield-alt'/> <a href='https://beian.miit.gov.cn/' className='mr-2'>{BLOG.BEI_AN}</a><br/></>}
 
diff --git a/themes/next/components/Footer.js b/themes/next/components/Footer.js
index 334bd246..cb83aebe 100644
--- a/themes/next/components/Footer.js
+++ b/themes/next/components/Footer.js
@@ -5,14 +5,20 @@ import DarkModeButton from '@/components/DarkModeButton'
 const Footer = ({ title }) => {
   const d = new Date()
   const currentYear = d.getFullYear()
-  const startYear = BLOG.SINCE && BLOG.SINCE !== currentYear && BLOG.SINCE + '-'
+  const copyrightDate = (function() {
+    if (Number.isInteger(BLOG.SINCE) && BLOG.SINCE < currentYear) {
+      return BLOG.SINCE + '-' + currentYear
+    }
+    return currentYear
+  })()
+
   return (
     <footer
       className='dark:bg-gray-900 flex-shrink-0 justify-center text-center m-auto w-full leading-6 text-sm p-6 dark:text-gray-400'
     >
       <DarkModeButton/>
       <span>
-        <i className='fas fa-copyright' /> {`${startYear}${currentYear}`} <span className='mx-1 animate-pulse'><i className='fas fa-heart' /></span> <a href={BLOG.LINK} className='underline font-bold '>{BLOG.AUTHOR}</a>.<br />
+        <i className='fas fa-copyright' /> {`${copyrightDate}`} <span className='mx-1 animate-pulse'><i className='fas fa-heart' /></span> <a href={BLOG.LINK} className='underline font-bold '>{BLOG.AUTHOR}</a>.<br />
 
         {BLOG.BEI_AN && <><i className='fas fa-shield-alt' /> <a href='https://beian.miit.gov.cn/' className='mr-2'>{BLOG.BEI_AN}</a><br /></>}