Date or Day Wheel Not Changing? Professional Calendar Function Repair in Hong Kong for Stuck, Misaligned, or Jammed Displays.
When your watch can no longer keep pace with time.
The date and day display is one of the most practical and popular complications on a mechanical watch. But when you find the calendar disc frozen at midnight, or jammed while using the quick-set function, it's more than an inconvenience—it's a sign that the calendar mechanism inside the movement has developed a fault.
Whether the cause is misaligned gears, component wear, or damage from improper handling, the master watchmakers at RG Watch Repair Center can precisely diagnose the root cause. With the most meticulous craftsmanship, we will repair your watch's calendar system, restoring its full functionality and ensuring it remains perfectly in sync with the passage of time.
Unveiling the #1 Cause: The "Adjustment Danger Zone" Between 10 PM and 2 AM
The vast majority of calendar function failures stem from one common mistake. If you have ever used the quick-set function to manually change the date while the watch's hands are between 10 PM and 2 AM, you have very likely damaged the internal calendar mechanism.
Why Does This "Danger Zone" Exist?
During this time window, the gears and levers that automatically advance the date disc are already slowly engaging to perform the date change. Forcing a manual quick-set adjustment at this time is like trying to jam a foreign object into a moving gear train. This can easily cause gear teeth to break, deform, or become misaligned, resulting in a jammed calendar or permanent damage where the date will no longer change.
Other Common Causes of Failure:
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Natural Component Wear: Over years of use, parts like the date jumper and springs can wear down, losing their ability to precisely advance the date disc.
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Dried Lubricants: A lack of proper lubrication in the calendar components increases friction, which can prevent the movement from having enough power to complete the date change smoothly.
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Accidental Shocks: A strong external impact can potentially dislodge or misalign the components that hold the calendar disc in place.
Micron-Level Precision: Our Calendar Function Repair Process
Repairing a calendar function requires disassembling the movement to a specific level—a meticulous task that demands exceptional patience and skill. Contact Us
1. Initial Function Test
We begin by manually advancing the hands through a full 24-hour cycle. This allows us to observe the calendar and day systems in action and make a preliminary diagnosis of the fault.
2. Disassembly to the Calendar Layer
Our watchmaker carefully removes the hands and dial to gain access to the precision calendar and day components, which are located on the top layer of the movement.
3. Detailed Component Inspection
Under a high-magnification microscope, we meticulously examine the dozens of related components—including the date disc, day wheel, jumper, and quick-set gears—to identify the exact parts that are worn or damaged.
4. Part Replacement & Repair
We replace any damaged gears or springs with new, high-quality components that meet the original manufacturer's specifications. Any misaligned parts are then precisely recalibrated.
5. Reassembly & Rigorous Testing
After reassembling the dial and hands, we repeatedly test the function by advancing the hands through multiple 24-hour cycles. We ensure the date and day change is crisp, precise, and perfectly synchronized at midnight, confirming the function has been completely restored.
About Calendar Functions - Frequently Asked Questions (FAQ)
Understanding the cause of an issue is the first step in any professional repair.
Our Commitment: We always provide a full diagnosis and quotation first. We will never proceed with any chargeable repairs without your prior approval. Contact Us
Q1: My watch has an "instantaneous date change" function. Does it also have an adjustment danger zone?
A1: Yes. Regardless of whether the calendar is instantaneous, semi-instantaneous, or gradual, the vast majority of mechanical calendar mechanisms begin to engage and store energy for several hours before midnight. Therefore, to be safe, we strongly recommend you treat 10 PM to 2 AM as a "danger zone" for all mechanical watches.
Q2: I accidentally adjusted the date in the danger zone, but it doesn't seem to be broken. Does it still need to be checked?
A2: Even if the function appears normal, the gear teeth may have sustained microscopic damage or stress that isn't immediately visible. While it may not require an immediate repair, it is essential that you inform our watchmaker during your next "complete overhaul" so that a targeted inspection can be performed.
Q3: Will a broken calendar function affect the watch's timekeeping?
A3: Generally, a calendar malfunction will not directly impact the accuracy of the timekeeping. However, if a broken gear tooth or other debris falls into the rest of the movement, it could jam the gear train, causing the watch to stop and leading to more serious damage.
Q4: What is the approximate cost to repair the calendar function?
A4: The cost depends on the extent of the damage and whether replacement parts are needed. A minor misalignment or adjustment will be relatively inexpensive. However, if multiple gear components need to be replaced, the cost will be higher. The best approach is to bring your watch to our workshop for a complimentary, hands-on assessment by our master watchmaker.
