[{"data":1,"prerenderedAt":505},["ShallowReactive",2],{"blog-post-unix-timestamp-converter-guide":3},{"id":4,"title":5,"author":6,"body":7,"description":489,"draft":490,"extension":491,"lang":492,"meta":493,"navigation":494,"path":495,"pubDate":496,"relatedTool":497,"seo":498,"stem":499,"tags":500,"__hash__":504},"blog\u002Fblog\u002Funix-timestamp-converter-guide.mdx","Unix Timestamp Converter: What It Is and How to Use It","ujiffy team",{"type":8,"value":9,"toc":479},"minimark",[10,24,27,32,47,61,64,68,74,96,107,113,117,124,130,140,157,163,169,173,176,256,267,272,283,287,292,295,348,351,374,379,381,418,420,435,438,442,456,463,472,475],[11,12,13,14,18,19,23],"p",{},"If you've spent any time reading server logs, working with APIs, or debugging date-related bugs, you've probably run into a number like ",[15,16,17],"code",{},"1715760000",". It's not random — it's a ",[20,21,22],"strong",{},"Unix timestamp",", and it represents a very specific moment in time.",[11,25,26],{},"In this guide, you'll learn exactly what Unix timestamps are, why developers use them, and how to convert them to human-readable dates (and back) using an online tool.",[28,29,31],"h2",{"id":30},"what-is-a-unix-timestamp","What Is a Unix Timestamp?",[11,33,34,35,38,39,42,43,46],{},"A Unix timestamp (also called ",[20,36,37],{},"epoch time",") is the number of ",[20,40,41],{},"seconds that have elapsed since January 1, 1970, at 00:00:00 UTC",". That reference point — midnight UTC on January 1st, 1970 — is called the ",[20,44,45],{},"Unix epoch",".",[11,48,49,50,52,53,57,58,46],{},"So ",[15,51,17],{}," doesn't mean \"some random big number.\" It means: ",[54,55,56],"em",{},"1,715,760,000 seconds after January 1, 1970, UTC"," — which works out to ",[20,59,60],{},"May 15, 2025, 08:00:00 UTC",[11,62,63],{},"This system was established with the Unix operating system in the early 1970s, and it's been the standard for representing time in computing ever since.",[28,65,67],{"id":66},"seconds-vs-milliseconds-an-important-distinction","Seconds vs. Milliseconds: An Important Distinction",[11,69,70,71,46],{},"Here's a source of confusion that trips up a lot of developers: ",[20,72,73],{},"not all timestamps are in seconds",[75,76,77,87],"ul",{},[78,79,80,83,84,86],"li",{},[20,81,82],{},"Unix timestamp (seconds):"," ",[15,85,17],{}," — 10 digits",[78,88,89,83,92,95],{},[20,90,91],{},"Millisecond timestamp:",[15,93,94],{},"1715760000000"," — 13 digits",[11,97,98,99,102,103,106],{},"JavaScript's ",[15,100,101],{},"Date.now()"," returns milliseconds. Many databases and APIs also use milliseconds. Python's ",[15,104,105],{},"time.time()"," returns seconds (as a float). The distinction matters — if you pass a millisecond timestamp to code expecting seconds, you'll get a date in the year 57,000-something.",[11,108,109,112],{},[20,110,111],{},"Quick rule of thumb:"," If your timestamp is 10 digits, it's probably seconds. If it's 13 digits, it's probably milliseconds.",[28,114,116],{"id":115},"why-do-developers-use-unix-timestamps","Why Do Developers Use Unix Timestamps?",[11,118,119,120,123],{},"It might seem strange to store dates as big numbers instead of something like ",[15,121,122],{},"\"2025-05-15 08:00:00\"",". But timestamps have real advantages:",[11,125,126,129],{},[20,127,128],{},"Timezone-independent."," A Unix timestamp always refers to a moment in UTC. When you convert it to a local time, you apply the timezone offset at display time — not at storage time. This eliminates entire categories of timezone-related bugs.",[11,131,132,135,136,139],{},[20,133,134],{},"Easy arithmetic."," Want to know if something happened more than 7 days ago? Just compare: ",[15,137,138],{},"now - timestamp > 7 * 24 * 3600",". No string parsing, no date library, no edge cases around month lengths.",[11,141,142,145,146,149,150,149,153,156],{},[20,143,144],{},"Universally supported."," Every programming language and database understands Unix timestamps. You don't need to worry about date string formatting inconsistencies (",[15,147,148],{},"MM\u002FDD\u002FYYYY"," vs ",[15,151,152],{},"DD-MM-YYYY",[15,154,155],{},"YYYY-MM-DD",").",[11,158,159,162],{},[20,160,161],{},"Compact storage."," Storing a single integer takes less space than storing a formatted date string, which matters at scale.",[11,164,165,168],{},[20,166,167],{},"Sortable."," Timestamps sort correctly as plain integers. No special date sorting logic needed.",[28,170,172],{"id":171},"common-timestamp-reference-values","Common Timestamp Reference Values",[11,174,175],{},"It helps to have a few anchor points memorized so you can sanity-check timestamps at a glance:",[177,178,179,192],"table",{},[180,181,182],"thead",{},[183,184,185,189],"tr",{},[186,187,188],"th",{},"Date",[186,190,191],{},"Unix Timestamp (seconds)",[193,194,195,206,216,226,236,246],"tbody",{},[183,196,197,201],{},[198,199,200],"td",{},"January 1, 2000 (Y2K)",[198,202,203],{},[15,204,205],{},"946684800",[183,207,208,211],{},[198,209,210],{},"January 1, 2010",[198,212,213],{},[15,214,215],{},"1262304000",[183,217,218,221],{},[198,219,220],{},"January 1, 2020",[198,222,223],{},[15,224,225],{},"1577836800",[183,227,228,231],{},[198,229,230],{},"January 1, 2024",[198,232,233],{},[15,234,235],{},"1704067200",[183,237,238,241],{},[198,239,240],{},"January 1, 2025",[198,242,243],{},[15,244,245],{},"1735689600",[183,247,248,251],{},[198,249,250],{},"January 1, 2030",[198,252,253],{},[15,254,255],{},"1893456000",[11,257,258,259,262,263,266],{},"If you see a timestamp around ",[15,260,261],{},"1.7 billion",", it's somewhere in 2023–2024. If you see one around ",[15,264,265],{},"1.9 billion",", it's in the 2030s. These mental anchors help you quickly spot a timestamp that's off by a factor of 1000 (seconds vs. milliseconds).",[268,269,271],"h3",{"id":270},"the-year-2038-problem","The Year 2038 Problem",[11,273,274,275,278,279,282],{},"A quick note for the curious: 32-bit Unix timestamps will overflow on ",[20,276,277],{},"January 19, 2038, at 03:14:07 UTC"," (timestamp ",[15,280,281],{},"2147483647","). After that, 32-bit signed integers wrap around to negative values. This is the \"Year 2038 problem\" — similar in concept to Y2K. Most modern systems use 64-bit timestamps, which won't overflow for hundreds of billions of years.",[28,284,286],{"id":285},"how-to-convert-a-timestamp","How to Convert a Timestamp",[11,288,289],{},[20,290,291],{},"Timestamp → Human-readable date:",[11,293,294],{},"In JavaScript:",[296,297,302],"pre",{"className":298,"code":299,"language":300,"meta":301,"style":301},"language-js shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","new Date(1715760000 * 1000).toISOString()\n\u002F\u002F \"2025-05-15T08:00:00.000Z\"\n","js","",[15,303,304,341],{"__ignoreMap":301},[305,306,309,313,317,321,324,327,330,333,335,338],"span",{"class":307,"line":308},"line",1,[305,310,312],{"class":311},"sMK4o","new",[305,314,316],{"class":315},"s2Zo4"," Date",[305,318,320],{"class":319},"sTEyZ","(",[305,322,17],{"class":323},"sbssI",[305,325,326],{"class":311}," *",[305,328,329],{"class":323}," 1000",[305,331,332],{"class":319},")",[305,334,46],{"class":311},[305,336,337],{"class":315},"toISOString",[305,339,340],{"class":319},"()\n",[305,342,344],{"class":307,"line":343},2,[305,345,347],{"class":346},"sHwdD","\u002F\u002F \"2025-05-15T08:00:00.000Z\"\n",[11,349,350],{},"In Python:",[296,352,356],{"className":353,"code":354,"language":355,"meta":301,"style":301},"language-python shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import datetime\ndatetime.datetime.utcfromtimestamp(1715760000)\n# datetime.datetime(2025, 5, 15, 8, 0)\n","python",[15,357,358,363,368],{"__ignoreMap":301},[305,359,360],{"class":307,"line":308},[305,361,362],{},"import datetime\n",[305,364,365],{"class":307,"line":343},[305,366,367],{},"datetime.datetime.utcfromtimestamp(1715760000)\n",[305,369,371],{"class":307,"line":370},3,[305,372,373],{},"# datetime.datetime(2025, 5, 15, 8, 0)\n",[11,375,376],{},[20,377,378],{},"Current date → Timestamp:",[11,380,294],{},[296,382,384],{"className":298,"code":383,"language":300,"meta":301,"style":301},"Math.floor(Date.now() \u002F 1000)  \u002F\u002F current Unix timestamp in seconds\n",[15,385,386],{"__ignoreMap":301},[305,387,388,391,393,396,399,401,404,407,410,412,415],{"class":307,"line":308},[305,389,390],{"class":319},"Math",[305,392,46],{"class":311},[305,394,395],{"class":315},"floor",[305,397,398],{"class":319},"(Date",[305,400,46],{"class":311},[305,402,403],{"class":315},"now",[305,405,406],{"class":319},"() ",[305,408,409],{"class":311},"\u002F",[305,411,329],{"class":323},[305,413,414],{"class":319},")  ",[305,416,417],{"class":346},"\u002F\u002F current Unix timestamp in seconds\n",[11,419,350],{},[296,421,423],{"className":353,"code":422,"language":355,"meta":301,"style":301},"import time\nint(time.time())  # current Unix timestamp in seconds\n",[15,424,425,430],{"__ignoreMap":301},[305,426,427],{"class":307,"line":308},[305,428,429],{},"import time\n",[305,431,432],{"class":307,"line":343},[305,433,434],{},"int(time.time())  # current Unix timestamp in seconds\n",[11,436,437],{},"These work fine in code, but when you just need a quick answer — or you're debugging and don't have a REPL open — an online converter is much faster.",[28,439,441],{"id":440},"when-an-online-tool-beats-writing-code","When an Online Tool Beats Writing Code",[75,443,444,447,450,453],{},[78,445,446],{},"You're reading a log file and need to decode a timestamp quickly",[78,448,449],{},"You want to check what timestamp corresponds to a specific date in the past or future",[78,451,452],{},"You're comparing timestamps across systems and need to verify they match",[78,454,455],{},"You're onboarding and need to explain timestamps to a non-technical teammate",[11,457,458,459,462],{},"An online converter handles seconds ",[54,460,461],{},"and"," milliseconds, shows you the result in multiple timezones, and requires zero setup.",[11,464,465],{},[466,467,469],"a",{"href":468},"\u002Ftools\u002Ftimestamp-converter",[20,470,471],{},"Try ujiffy Timestamp Converter →",[11,473,474],{},"Paste any Unix timestamp, get a readable date instantly — or pick a date and get its timestamp. No setup required.",[476,477,478],"style",{},"html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sbssI, html code.shiki .sbssI{--shiki-light:#F76D47;--shiki-default:#F78C6C;--shiki-dark:#F78C6C}html pre.shiki code .sHwdD, html code.shiki .sHwdD{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}",{"title":301,"searchDepth":343,"depth":343,"links":480},[481,482,483,484,487,488],{"id":30,"depth":343,"text":31},{"id":66,"depth":343,"text":67},{"id":115,"depth":343,"text":116},{"id":171,"depth":343,"text":172,"children":485},[486],{"id":270,"depth":370,"text":271},{"id":285,"depth":343,"text":286},{"id":440,"depth":343,"text":441},"Confused by Unix timestamps? Learn what epoch time is, why developers use it, how to convert timestamps to readable dates, and find common timestamp values.",false,"mdx","en",{},true,"\u002Fblog\u002Funix-timestamp-converter-guide","2025-05-20","timestamp-converter",{"title":5,"description":489},"blog\u002Funix-timestamp-converter-guide",[501,37,502,503],"unix timestamp","timestamp converter","developer tools","TFzvosT4GBTQLsoWoBY7IMBph-QFVI_bdGeLbURkrq8",1778839886363]