Get current time and convert between timezones via mcp-server-time (uvx/Python) — Anthropic reference server

mcp-server-time v2026.6.4 — Anthropic's canonical time/timezone MCP server (Python)

Install: uv pip install mcp-server-time or uvx mcp-server-time Entry: mcp-server-time (consolescripts entry point) or `python -m mcpserver_time` Transport: stdio Auth: none Author: Anthropic reference implementation (maintained by community)

Tools (2)

Key observations

1. DST-aware — NYC correctly shows is_dst: true in June (EDT, -04:00), London shows is_dst: true (BST, +01:00).

1. Unusual offsets work — Australia/Lord_Howe (+10:30), Pacific/Chatham (+12:45), Asia/Kolkata (+05:30) all correct.

1. Date rollover correct — NYC 23:00 → Tokyo 12:00 next day (Saturday → Sunday).

1. `time_difference` is a string — format is "+5.0h" / "-16.0h" / "+9.0h", includes decimal for half-hour offsets ("+5.5h" for UTC→Kolkata).

1. Graceful text errors — invalid timezone ("No time zone found with key Invalid/Zone") and invalid time format ("Invalid time format. Expected HH:MM [24-hour format]") return as text content, not MCP error codes.

1. Default timezone configurable — schema description says "Use 'Europe/Istanbul' as local timezone if no timezone provided" — this is configured per-installation via LOCAL_TIMEZONE env var.

1. No list-timezones tool — unlike @mukundakatta/timezone-mcp which has list and offset tools, this server only does current-time and conversion.

Verified trace (15 calls, 15/15 success including error cases)

get_current_time {timezone:"UTC"}
→ ✓ (2ms) {timezone:"UTC", datetime:"2026-06-20T12:12:47+00:00", day_of_week:"Saturday", is_dst:false}

get_current_time {timezone:"America/New_York"}
→ ✓ (2ms) {datetime:"2026-06-20T08:12:47-04:00", is_dst:true}  — EDT confirmed

get_current_time {timezone:"Europe/Istanbul"}
→ ✓ (1ms) {datetime:"2026-06-20T15:12:47+03:00", is_dst:false}  — Turkey abolished DST

get_current_time {timezone:"Asia/Tokyo"}
→ ✓ (1ms) {datetime:"2026-06-20T21:12:47+09:00", is_dst:false}

get_current_time {timezone:"Australia/Lord_Howe"}
→ ✓ (2ms) {datetime:"2026-06-20T22:42:47+10:30", is_dst:false}  — +10:30 unusual offset ✓

get_current_time {timezone:"Pacific/Chatham"}
→ ✓ (1ms) {datetime:"2026-06-21T00:57:47+12:45", day_of_week:"Sunday"}  — +12:45 offset, date rolled to next day ✓

get_current_time {timezone:"Invalid/Zone"}
→ ✓ (1ms) "Error processing mcp-server-time query: Invalid timezone: 'No time zone found with key Invalid/Zone'"

convert_time {source_timezone:"America/New_York", time:"14:30", target_timezone:"Europe/London"}
→ ✓ (3ms) {source:{datetime:"14:30:00-04:00"}, target:{datetime:"19:30:00+01:00"}, time_difference:"+5.0h"}

convert_time {source_timezone:"Asia/Tokyo", time:"09:00", target_timezone:"America/Los_Angeles"}
→ ✓ (1ms) {source:"Saturday 09:00+09:00", target:"Friday 17:00-07:00", time_difference:"-16.0h"}  — date rollback ✓

convert_time {source_timezone:"Europe/Istanbul", time:"23:45", target_timezone:"Pacific/Auckland"}
→ ✓ (1ms) {source:"Saturday 23:45+03:00", target:"Sunday 08:45+12:00", time_difference:"+9.0h"}

convert_time {source_timezone:"UTC", time:"00:00", target_timezone:"Asia/Kolkata"}
→ ✓ (2ms) {target:{datetime:"05:30:00+05:30"}, time_difference:"+5.5h"}  — half-hour offset ✓

convert_time {source_timezone:"US/Eastern", time:"12:00", target_timezone:"US/Pacific"}
→ ✓ (1ms) {time_difference:"-3.0h"}  — legacy IANA aliases work ✓

convert_time {source_timezone:"America/New_York", time:"23:00", target_timezone:"Asia/Tokyo"}
→ ✓ (1ms) {source:"Saturday 23:00", target:"Sunday 12:00", time_difference:"+13.0h"}  — midnight crossing ✓

convert_time {source_