Two notes say 1:30 after the clocks move back: keep their order clear

Identify the clock problem separately from the event

NIST describes clocks moving back an hour at the end of daylight saving time where that change is observed. This is a timekeeping reference, not a quit-tracking rule. The shift does not create an additional vaping event, erase one, or establish how a particular app assigns dates.

You do not need to look for a clock problem on every day. Investigate when the local change actually affects the period you are reading. Check the relevant location rather than assuming every US region follows the same rule. Avoid using a general daylight-saving calendar to fill an offset that you never recorded.

US National Institute of Standards and Technology: Help with WWVB Radio Controlled Clocks

Preserve the sequence you observed

For an invented example, one note was written at the first occurrence of 1:30 and a second at the later occurrence after the clock moved back. If you know that sequence, a private annotation can distinguish “before the clock change” and “after the clock change.” Those descriptions retain useful order without pretending that both notes share one instant.

If you know a complete timestamp including its actual offset, preserve that information. If you do not, do not attach a guessed offset simply to make the rows sort neatly. An approximate description such as “earlier during the repeated hour” may be more accurate than a precise-looking reconstruction.

Check which timestamp the tool is showing

A saved time, an event time, and a local display of a stored timestamp can differ. Consult the actual service explanation or ask its provider before assuming which one appears. Two tools may display the same observation differently without recording two events. No Vape’s published tracking features do not establish a particular time-zone implementation.

Do not delete an entry solely because its visible clock label matches another. Use the observation content and any known provenance when examining a possible duplicate. If the information is insufficient, retain the uncertainty. Likewise, do not split one ongoing episode into two because the wall clock passed the same minute twice.

No Vape: No Vape — app features and store links

Use only the precision your planning question needs

If you want to understand a late-night routine, a sequence like “before finishing the task; later while waiting” may be sufficient. You can keep the clock ambiguity visible and still identify a practical transition to prepare for. Exact elapsed minutes may remain unavailable, so avoid calculating them from local labels alone.

This labeling exercise cannot reconstruct missing events, measure nicotine exposure, or prove a complete vape-free day. Finish with a short convention you can explain: known sequence retained, unknown offset not supplied. The record should stay usable without requiring you to revise every timestamp or stay awake to document the clock change.