Timezone Truth
Convert times between IANA zones and detect skipped or ambiguous DST local times.
Connect it
Settings → Connectors → Add custom connector
URL: https://timezone-truth.gumballtools.com/api/mcpSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://timezone-truth.gumballtools.com/api/mcp{
"mcpServers": {
"timezone-truth": {
"url": "https://timezone-truth.gumballtools.com/api/mcp"
}
}
}claude mcp add --transport http timezone-truth https://timezone-truth.gumballtools.com/api/mcp{
"servers": {
"timezone-truth": {
"type": "http",
"url": "https://timezone-truth.gumballtools.com/api/mcp"
}
}
}1 tools, verified live
convert_timeread-onlyConvert a wall-clock time between two IANA timezones, and report the ways the conversion can be wrong. ALWAYS use this instead of doing the arithmetic. Timezone conversion looks like addition and is not: the mapping from a local time to an instant is not a function. - On the spring-forward date, an hour of local time DOES NOT EXIST. Asked to convert 02:30 on that date, a model will return a plau
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