[docs] Document timestamp search qualifier for telemetry filtering

src/frontend/src/content/docs/reference/cli/commands/aspire-otel-logs.mdx

@@ -73,9 +73,10 @@ The following options are available:
   | `"quoted phrase"` | Single fragment containing spaces |
   | `field:value` | Field qualifier — value must match the named field |
   | `-field:value` | Negated qualifier — excludes matches |
+  | `field:>value` / `field:>=value` / `field:<value` / `field:<=value` | Comparison for supported timestamp fields |
   | `@attr:value` | Attribute qualifier — matches custom log attributes |
 
-  Supported fields for structured logs: `severity`, `resource`, `scope`, `message`, `trace-id`, `span-id`, `event`.
+  Supported fields for structured logs: `severity`, `resource`, `scope`, `message`, `trace-id`, `span-id`, `event`, `timestamp`.
 
 - <Include relativePath="reference/cli/includes/option-help.md" />
 
@@ -133,6 +134,12 @@ The following options are available:
   aspire otel logs --search "scope:Microsoft.EntityFrameworkCore severity:Warning"
   ```
 
+- Filter logs by timestamp:
+
+  ```bash title="Aspire CLI"
+  aspire otel logs --search "timestamp:>=2024-06-01T12:00:00 severity:error"
+  ```
+
 - View logs from a standalone dashboard using the login URL (token is automatically exchanged for an API key):
 
   ```bash title="Aspire CLI"

src/frontend/src/content/docs/reference/cli/commands/aspire-otel-spans.mdx

@@ -73,10 +73,10 @@ The following options are available:
   | `"quoted phrase"` | Single fragment containing spaces |
   | `field:value` | Field qualifier — value must match the named field |
   | `-field:value` | Negated qualifier — excludes matches |
-  | `field:>N` / `field:>=N` / `field:<N` / `field:<=N` | Comparison for numeric fields |
+  | `field:>value` / `field:>=value` / `field:<value` / `field:<=value` | Comparison for supported `duration` and `timestamp` fields |
   | `@attr:value` | Attribute qualifier — matches custom span attributes |
 
-  Supported fields for spans: `resource`, `name`, `span-id`, `trace-id`, `status`, `kind`, `duration`.
+  Supported fields for spans: `resource`, `name`, `span-id`, `trace-id`, `status`, `kind`, `duration`, `timestamp`.
 
 - <Include relativePath="reference/cli/includes/option-help.md" />
 
@@ -134,6 +134,12 @@ The following options are available:
   aspire otel spans --search "@db.system:postgresql"
   ```
 
+- Filter spans by timestamp:
+
+  ```bash title="Aspire CLI"
+  aspire otel spans --search "timestamp:>=2024-03-01T08:30:00 kind:server"
+  ```
+
 - View spans from a standalone dashboard using the login URL (token is automatically exchanged for an API key):
 
   ```bash title="Aspire CLI"

src/frontend/src/content/docs/reference/cli/commands/aspire-otel-traces.mdx

@@ -71,10 +71,10 @@ The following options are available:
   | `"quoted phrase"` | Single fragment containing spaces |
   | `field:value` | Field qualifier — value must match the named field |
   | `-field:value` | Negated qualifier — excludes matches |
-  | `field:>N` / `field:>=N` / `field:<N` / `field:<=N` | Comparison for numeric fields |
+  | `field:>value` / `field:>=value` / `field:<value` / `field:<=value` | Comparison for supported `duration` and `timestamp` fields |
   | `@attr:value` | Attribute qualifier — matches custom span attributes |
 
-  Supported fields for traces: `resource`, `name`, `trace-id`, `status`, `duration`.
+  Supported fields for traces: `resource`, `name`, `trace-id`, `status`, `duration`, `timestamp`.
 
 - <Include relativePath="reference/cli/includes/option-help.md" />
 
@@ -132,6 +132,12 @@ The following options are available:
   aspire otel traces --search "@http.status_code:500"
   ```
 
+- Filter traces by timestamp:
+
+  ```bash title="Aspire CLI"
+  aspire otel traces --search "timestamp:>2024-01-15T09:30:00 status:error"
+  ```
+
 - View traces from a standalone dashboard using the login URL (token is automatically exchanged for an API key):
 
   ```bash title="Aspire CLI"

src/frontend/src/content/docs/reference/cli/search-filter.mdx

@@ -28,10 +28,26 @@ Search queries support free-text fragments, field qualifiers, attribute qualifie
 | `field:"value with spaces"` | Quoted field qualifier value | `message:"connection failed"` |
 | `@attr:value` | Attribute qualifier — matches custom span/log attributes | `@http.method:GET` |
 | `-field:value` / `-@attr:value` | Negated qualifier — excludes matches | `-severity:debug` |
-| `field:>N` / `field:>=N` / `field:<N` / `field:<=N` | Numeric comparison | `duration:>100` |
+| `field:>value` / `field:>=value` / `field:<value` / `field:<=value` | Comparison for supported numeric and timestamp fields | `duration:>100` |
 
 All terms are AND'd: every fragment and qualifier must independently match.
 
+## Timestamp qualifier
+
+Use the `timestamp` field qualifier to narrow structured logs, traces, and spans to a specific date/time range. The qualifier accepts ISO 8601 date or date/time strings together with a comparison operator:
+
+```bash title="Aspire CLI"
+aspire otel logs --search "timestamp:>2024-01-15T09:30:00"
+aspire otel traces --search "timestamp:<=2024-06-01T12:00:00Z"
+aspire otel spans --search "timestamp:>=2024-01-01 timestamp:<2025-01-01"
+```
+
+The supported comparison operators are `>`, `>=`, `<`, and `<=`. Timestamp values follow these timezone rules:
+
+- A value with no timezone suffix (for example `2024-01-15` or `2024-01-15T09:30:00`) is treated as local time on the dashboard server.
+- A value with a UTC offset (for example `+05:00`) is adjusted to UTC before comparison.
+- A value with the `Z` suffix is treated as UTC directly.
+
 ## Console logs
 
 Matches against log line text content and resource name. Only free-text is supported (no structured qualifiers).
@@ -45,36 +61,39 @@ aspire logs --follow --search "\"connection error\""
 
 Supports free-text and structured qualifiers. Free-text matches against message, resource name, scope, trace/span IDs, severity, and all attribute keys/values.
 
-Available field qualifiers: `severity`, `resource`, `scope`, `message`, `trace-id`, `span-id`, `event`.
+Available field qualifiers: `severity`, `resource`, `scope`, `message`, `trace-id`, `span-id`, `event`, `timestamp`.
 
 ```bash title="Aspire CLI"
 aspire otel logs --search "severity:error \"connection failed\""
 aspire otel logs --search "resource:api -severity:debug"
 aspire otel logs --search "scope:Microsoft.EntityFrameworkCore"
+aspire otel logs --search "timestamp:>=2024-06-01T12:00:00 severity:error"
 ```
 
 ## Traces
 
 Supports free-text and structured qualifiers. Free-text matches against trace name, resource name, and all span fields within the trace.
 
-Available field qualifiers: `name`, `resource`, `trace-id`, `status`, `duration`.
+Available field qualifiers: `name`, `resource`, `trace-id`, `status`, `duration`, `timestamp`.
 
 ```bash title="Aspire CLI"
 aspire otel traces --search "checkout"
 aspire otel traces --search "status:error duration:>500"
 aspire otel traces --search "@http.status_code:500"
+aspire otel traces --search "timestamp:>2024-01-15T09:30:00 status:error"
 ```
 
 ## Spans
 
 Supports free-text and structured qualifiers. Free-text matches against span name, resource name, scope, trace/span IDs, status, kind, and all attribute keys/values.
 
-Available field qualifiers: `name`, `resource`, `scope`, `status`, `kind`, `trace-id`, `span-id`, `duration`.
+Available field qualifiers: `name`, `resource`, `scope`, `status`, `kind`, `trace-id`, `span-id`, `duration`, `timestamp`.
 
 ```bash title="Aspire CLI"
 aspire otel spans --search "@http.method:GET duration:>100 status:error"
 aspire otel spans --search "@db.system:postgresql"
 aspire otel spans --search "-kind:internal"
+aspire otel spans --search "timestamp:>=2024-03-01T08:30:00 kind:server"
 ```
 
 ## See also