https://blog.epoch-tools.com/posts/ Recent content in Posts on Epoch Tools Blog Hugo en-us Sat, 06 Jun 2026 10:00:00 +0000 https://blog.epoch-tools.com/posts/timestamp-to-pacific-time/ Sat, 06 Jun 2026 10:00:00 +0000 https://blog.epoch-tools.com/posts/timestamp-to-pacific-time/ <p>Use this page to <strong>convert timestamp to Pacific Time with DST</strong> — enter any Unix or epoch timestamp below and get an instant, daylight-saving-aware result in PST or PDT.</p> <div class="epoch-converter not-prose" id="pacific-converter"> <div class="epoch-converter__panel"> <label class="epoch-converter__label" for="pacific-ts-input">Unix timestamp</label> <div class="epoch-converter__input-row"> <input type="text" id="pacific-ts-input" class="epoch-converter__input" inputmode="numeric" placeholder="e.g. 1711324800" autocomplete="off" spellcheck="false" /> <button type="button" class="epoch-converter__btn" id="pacific-ts-now">Use now</button> </div> <p class="epoch-converter__hint">Seconds since Jan 1, 1970 UTC. Millisecond values are detected automatically.</p> </div> <div class="epoch-converter__results" id="pacific-ts-results" aria-live="polite"> <div class="epoch-converter__result-main" id="pacific-ts-formatted">—</div> <dl class="epoch-converter__meta"> <div class="epoch-converter__meta-item"> <dt>UTC offset</dt> <dd id="pacific-ts-offset">—</dd> </div> <div class="epoch-converter__meta-item"> <dt>DST active</dt> <dd id="pacific-ts-dst">—</dd> </div> <div class="epoch-converter__meta-item"> <dt>Timezone</dt> <dd>America/Los_Angeles</dd> </div> </dl> </div> </div> <script> (function () { var TZ = "America/Los_Angeles"; var input = document.getElementById("pacific-ts-input"); var formatted = document.getElementById("pacific-ts-formatted"); var offsetEl = document.getElementById("pacific-ts-offset"); var dstEl = document.getElementById("pacific-ts-dst"); var nowBtn = document.getElementById("pacific-ts-now"); function parseTimestamp(raw) { var trimmed = String(raw || "").trim().replace(/,/g, ""); if (!trimmed) return null; var num = Number(trimmed); if (!Number.isFinite(num)) return null; if (Math.abs(num) >= 1e12) num = Math.floor(num / 1000); return num; } function getOffsetMinutes(date) { var parts = new Intl.DateTimeFormat("en-US", { timeZone: TZ, timeZoneName: "longOffset" }).formatToParts(date); var offsetPart = parts.find(function (p) { return p.type === "timeZoneName"; }); if (!offsetPart) return null; var match = offsetPart.value.match(/GMT([+-])(\d{1,2})(?::(\d{2}))?/); if (!match) return null; var sign = match[1] === "-" ? -1 : 1; var hours = parseInt(match[2], 10); var mins = match[3] ? parseInt(match[3], 10) : 0; return sign * (hours * 60 + mins); } function isDstActive(date) { var jan = new Date(date.getFullYear(), 0, 15); var jul = new Date(date.getFullYear(), 6, 15); var winter = getOffsetMinutes(jan); var summer = getOffsetMinutes(jul); var current = getOffsetMinutes(date); if (winter === null || summer === null || current === null) return null; return current !== winter; } function formatPacific(date) { return new Intl.DateTimeFormat("en-US", { timeZone: TZ, weekday: "long", year: "numeric", month: "long", day: "numeric", hour: "numeric", minute: "2-digit", second: "2-digit", timeZoneName: "short" }).format(date); } function formatOffset(minutes) { if (minutes === null) return "—"; var sign = minutes >= 0 ? "+" : "-"; var abs = Math.abs(minutes); var h = Math.floor(abs / 60); var m = abs % 60; return "UTC" + sign + h + (m ? ":" + String(m).padStart(2, "0") : ""); } function showError(msg) { formatted.textContent = msg; offsetEl.textContent = "—"; dstEl.textContent = "—"; } function convert() { var ts = parseTimestamp(input.value); if (ts === null) { showError("Enter a valid Unix timestamp."); return; } if (ts < -62135596800 || ts > 4102444800) { showError("Timestamp out of supported range."); return; } var date = new Date(ts * 1000); if (isNaN(date.getTime())) { showError("Invalid timestamp."); return; } formatted.textContent = formatPacific(date); var offsetMin = getOffsetMinutes(date); offsetEl.textContent = formatOffset(offsetMin); var dst = isDstActive(date); dstEl.textContent = dst === null ? "—" : (dst ? "Yes (PDT)" : "No (PST)"); } input.addEventListener("input", convert); input.addEventListener("change", convert); nowBtn.addEventListener("click", function () { input.value = String(Math.floor(Date.now() / 1000)); convert(); }); input.value = "1711324800"; convert(); })(); </script> <h2 id="what-is-pacific-time-pst-vs-pdt">What Is Pacific Time? (PST vs PDT)</h2> <table> <thead> <tr> <th></th> <th>PST</th> <th>PDT</th> </tr> </thead> <tbody> <tr> <td>Full name</td> <td>Pacific Standard Time</td> <td>Pacific Daylight Time</td> </tr> <tr> <td>UTC offset</td> <td>UTC−8</td> <td>UTC−7</td> </tr> <tr> <td>Active period</td> <td>Nov – Mar</td> <td>Mar – Nov</td> </tr> <tr> <td>DST active?</td> <td>No</td> <td>Yes</td> </tr> </tbody> </table> <p>&ldquo;Pacific Time&rdquo; is not a fixed UTC offset. The US Pacific timezone switches between <strong>PST (UTC−8)</strong> in winter and <strong>PDT (UTC−7)</strong> in summer when Daylight Saving Time is in effect. That is why hardcoding <code>-8</code> in your code is one of the most common timestamp conversion bugs — your summer timestamps will be off by a full hour.</p> https://blog.epoch-tools.com/posts/epoch-time-vs-iso-8601/ Thu, 04 Dec 2025 21:57:44 +0530 https://blog.epoch-tools.com/posts/epoch-time-vs-iso-8601/ <p>Storing dates might seem pretty straightforward to most people, but it’s quite the opposite. It’s one of these sneaky and toughest challenges that trips up even the best of the developers. While some prefer picking up a sleek, minimalist <a href="https://en.wikipedia.org/wiki/Unix_time">Unix Epoch time</a> to maintain consistency and accuracy, others sometimes prefer <a href="https://en.wikipedia.org/wiki/ISO_8601">ISO 8601</a>, a standard date format that tells you the exact time with timezone in a human-friendly string.</p> <p>This post will help you demystify these two popular formats, showing you their strengths, weaknesses, and when to pick one over the other to keep your data accurate and developer-friendly while keeping you sane.</p> https://blog.epoch-tools.com/posts/handling-timezones-with-epoch/ Tue, 02 Dec 2025 21:12:12 +0530 https://blog.epoch-tools.com/posts/handling-timezones-with-epoch/ <p>When it comes to handling <a href="https://en.wikipedia.org/wiki/Time">time</a>, things can get a little ugly, especially if you’re dealing with different time zones and epoch time. Epoch time, the universal timestamp superhero, is counting seconds from January 1, 1970, endlessly. Sounds fun, right?</p> <p>While this may sound easy, in reality, it&rsquo;s quite the opposite. While epoch time might be straightforward and timezone-free, humans live in a world of local clocks, like PST in California or BJT in China. This complex standard makes it difficult to reliably convert one universal timestamp into the “right” local time without chaos.</p> https://blog.epoch-tools.com/posts/epoch-time-conversion/ Sat, 29 Nov 2025 20:48:43 +0530 https://blog.epoch-tools.com/posts/epoch-time-conversion/ <p><a href="https://en.wikipedia.org/wiki/Unix_time">Epoch time</a> is a system used in computing to represent time as a single, universal numeric value, which simplifies time-based calculations across different systems and time zones.</p> <p>Epoch time converter converts this epoch time into a human-readable format. The converter helps transform this simple integer into a clear, readable date quickly, accurately, and reliably, saving human time and drastically reducing errors caused by time-zone differences and format inconsistencies.</p> <h2 id="what-exactly-is-epoch-time--why-should-you-worry-about-it">What exactly is Epoch Time &amp; Why should you Worry About it?</h2> <p><a href="https://en.wikipedia.org/wiki/Unix_time">Epoch time</a>, also known as the Unix time, is a numeric representation of the amount of time that has elapsed since January 1, 1970, 00:00:00 UTC. This integer/numeric representation serves as a universal reference point across different computation services to make it more consistent and less error-prone.</p> https://blog.epoch-tools.com/posts/unix-timestamp-in-javascript/ Mon, 24 Nov 2025 22:56:29 +0530 https://blog.epoch-tools.com/posts/unix-timestamp-in-javascript/ <p>While <a href="https://en.wikipedia.org/wiki/Unix_time">Unix timestamps</a> are not that much cool and relevant to normal people in their day-to-day life, if you ask a developer or programmer about the same, it will be a whole different story altogether.</p> <p>While a <strong>Graphical User Interface (GUI)</strong> is excellent for quick checks and validation, it doesn&rsquo;t work quite the same when you are actively dealing with timestamps (especially <a href="https://en.wikipedia.org/wiki/Unix_time">Unix timestamps</a>) on a day-to-day basis, and just like any other dev!</p> https://blog.epoch-tools.com/posts/unix-timestamp/ Fri, 14 Nov 2025 22:04:48 +0530 https://blog.epoch-tools.com/posts/unix-timestamp/ <p>Unix time is a concept that originated in the early 1960s, during the development of the Unix system. while developing, Unix engineers needed a uniform &amp; simple way to represent time across the system, so they chose to count whole seconds from a fixed starting point - 00:00:00 UTC on 1 January 1970, thus creating Unix time as the upcoming standard for measuring time in computers.</p> <h2 id="what-exactly-is-a-unix-timestamp-in-the-first-place">What exactly is a Unix Timestamp in the first place</h2> <p><a href="https://en.wikipedia.org/wiki/Unix_time">Unix time</a> or Unix epoch is a date (precisely January 1st 1970 at 00:00:00 UTC) which was chosen by Unix engineers at Bell Labs to represent a convenient and uniform start point for expressing time.</p>