PromptVault
CodingFreeIntermediate

Find the boundary causing a daylight-saving failure

For engineers isolating date-time defects across parsing, storage, arithmetic, and display.

Works with
  • Codex
  • Cursor
  • GitHub Copilot
  • Ollama
The prompt133 words · 2 blanks

Diagnose the date-time failure in [time_evidence] for [runtime] through four numbered stages…

The full prompt is in the app

Free — no subscription needed. Fill in the blanks there, then copy it into Cursor.

What you fill in

  • Date-time evidence[time_evidence]ExampleFailing timestamps, expected output, storage values, timezone settings, and relevant code
  • Runtime ecosystem[runtime]ExampleJavaScript Temporal

How to use it

  1. 1Open it in PromptVault. Find it in Coding, or search for “Find the boundary causing a daylight-saving failure”.
  2. 2Fill in the 2 blanks. date-time evidence and runtime ecosystem — the only things the prompt cannot know.
  3. 3Copy and paste it into Cursor. It also works with Codex, GitHub Copilot and Ollama.

About this prompt

“Find the boundary causing a daylight-saving failure” is a intermediate coding prompt. For engineers isolating date-time defects across parsing, storage, arithmetic, and display. It is 133 words long and written to get a usable answer on the first message, in Codex, Cursor and GitHub Copilot or any other chat assistant. Good for: troubleshooting, debugging, step by step and testing. Like every prompt in PromptVault, it was written and edited in-house, and it works offline once the app is installed.

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