diff --git a/packages/testcontainers/src/common/time.test.ts b/packages/testcontainers/src/common/time.test.ts
index 7eefc96d8..fb7866f63 100644
--- a/packages/testcontainers/src/common/time.test.ts
+++ b/packages/testcontainers/src/common/time.test.ts
@@ -1,4 +1,4 @@
-import { toNanos, toSeconds } from "./time";
+import { toNanos, toSeconds, toUnixSeconds } from "./time";
 
 test.for([
   [0, 0],
@@ -23,3 +23,11 @@ test.for([
 ])("should convert %i ms to %i ns", ([ms, ns]) => {
   expect(toNanos(ms)).toEqual(ns);
 });
+
+test("toUnixSeconds leaves a Unix-seconds number unchanged", () => {
+  expect(toUnixSeconds(1_700_000_000)).toEqual(1_700_000_000);
+});
+
+test("toUnixSeconds converts a Date to Unix seconds", () => {
+  expect(toUnixSeconds(new Date(1_700_000_000_123))).toEqual(1_700_000_000);
+});
diff --git a/packages/testcontainers/src/common/time.ts b/packages/testcontainers/src/common/time.ts
index a3342d2b0..7cd13cad2 100644
--- a/packages/testcontainers/src/common/time.ts
+++ b/packages/testcontainers/src/common/time.ts
@@ -1,3 +1,7 @@
 export const toSeconds = (ms: number) => Math.trunc(ms * 1e-3);
 
 export const toNanos = (ms: number) => ms * 1e6;
+
+/** Unix seconds for Docker log filters. Numbers are already seconds; Dates are converted. */
+export const toUnixSeconds = (value: number | Date): number =>
+  value instanceof Date ? Math.trunc(value.getTime() * 1e-3) : value;
diff --git a/packages/testcontainers/src/container-runtime/clients/compose/types.ts b/packages/testcontainers/src/container-runtime/clients/compose/types.ts
index 02d6880d7..bc9c22818 100644
--- a/packages/testcontainers/src/container-runtime/clients/compose/types.ts
+++ b/packages/testcontainers/src/container-runtime/clients/compose/types.ts
@@ -24,6 +24,7 @@ type ComposeExecutableOptions =
     };
 
 export type ComposeDownOptions = {
+  /** Compose down timeout in milliseconds. */
   timeout: number;
   removeVolumes: boolean;
 };
diff --git a/packages/testcontainers/src/generic-container/abstract-started-container.ts b/packages/testcontainers/src/generic-container/abstract-started-container.ts
index 39c5acb2f..5b910c664 100644
--- a/packages/testcontainers/src/generic-container/abstract-started-container.ts
+++ b/packages/testcontainers/src/generic-container/abstract-started-container.ts
@@ -109,7 +109,7 @@ export class AbstractStartedContainer implements StartedTestContainer {
     return this.startedTestContainer.exec(command, opts);
   }
 
-  public logs(opts?: { since?: number; tail?: number }): Promise<Readable> {
+  public logs(opts?: { since?: number | Date; tail?: number }): Promise<Readable> {
     return this.startedTestContainer.logs(opts);
   }
 
diff --git a/packages/testcontainers/src/generic-container/generic-container-logs.test.ts b/packages/testcontainers/src/generic-container/generic-container-logs.test.ts
index 05159631a..29cba3401 100644
--- a/packages/testcontainers/src/generic-container/generic-container-logs.test.ts
+++ b/packages/testcontainers/src/generic-container/generic-container-logs.test.ts
@@ -49,6 +49,29 @@ describe("GenericContainer logs", { timeout: 180_000 }, () => {
     expect(log).toBe(logAfterSleep);
   });
 
+  it("should stream logs with since as a Date from a started container", async () => {
+    const pauseMs = 5 * 1000;
+    const logBeforeSleep = "first";
+    const logAfterSleep = "second";
+    await using container = await new GenericContainer("cristianrgreco/testcontainer:1.1.14")
+      .withEntrypoint([
+        "/bin/sh",
+        "-c",
+        `echo ${logBeforeSleep} && sleep ${pauseMs / 1000} && echo ${logAfterSleep} && sleep infinity`,
+      ])
+      .withWaitStrategy(Wait.forLogMessage(logBeforeSleep))
+      .start();
+
+    await new Promise((resolve) => setTimeout(resolve, pauseMs));
+
+    const since = new Date(Date.now() - pauseMs + 1000);
+
+    const stream = await container.logs({ since });
+    const log: string = await new Promise((resolve) => stream.on("data", (line) => resolve(line.trim())));
+
+    expect(log).toBe(logAfterSleep);
+  });
+
   it("should stream logs from a running container after restart", async () => {
     const containerLogTraceSpy = vi.spyOn(containerLog, "trace");
     await using container = await new GenericContainer("cristianrgreco/testcontainer:1.1.14")
diff --git a/packages/testcontainers/src/generic-container/generic-container.ts b/packages/testcontainers/src/generic-container/generic-container.ts
index fcb038bac..08c814319 100644
--- a/packages/testcontainers/src/generic-container/generic-container.ts
+++ b/packages/testcontainers/src/generic-container/generic-container.ts
@@ -558,12 +558,14 @@ export class GenericContainer implements TestContainer {
     return this;
   }
 
+  /** Resource limits. `memory` is gigabytes; `cpu` is CPUs. */
   public withResourcesQuota({ memory, cpu }: ResourcesQuota): this {
     this.hostConfig.Memory = memory !== undefined ? Math.ceil(memory * 1024 ** 3) : undefined;
     this.hostConfig.NanoCpus = cpu !== undefined ? Math.ceil(cpu * 10 ** 9) : undefined;
     return this;
   }
 
+  /** `/dev/shm` size in bytes. */
   public withSharedMemorySize(bytes: number): this {
     this.hostConfig.ShmSize = bytes;
     return this;
diff --git a/packages/testcontainers/src/generic-container/started-generic-container.ts b/packages/testcontainers/src/generic-container/started-generic-container.ts
index 6539caf40..18d9148b6 100644
--- a/packages/testcontainers/src/generic-container/started-generic-container.ts
+++ b/packages/testcontainers/src/generic-container/started-generic-container.ts
@@ -4,7 +4,7 @@ import archiver from "archiver";
 import AsyncLock from "async-lock";
 import type Dockerode from "dockerode";
 import type { ContainerInspectInfo } from "dockerode";
-import { containerLog, log } from "../common";
+import { containerLog, log, toUnixSeconds } from "../common";
 import { type ContainerRuntimeClient, getContainerRuntimeClient } from "../container-runtime";
 // biome-ignore lint/suspicious/noImportCycles: Ryuk and sshd run as GenericContainers; only dereferenced at runtime
 import { getReaper } from "../reaper/reaper";
@@ -257,10 +257,11 @@ export class StartedGenericContainer implements StartedTestContainer {
     return output;
   }
 
-  public async logs(opts?: { since?: number; tail?: number }): Promise<Readable> {
+  public async logs(opts?: { since?: number | Date; tail?: number }): Promise<Readable> {
     const client = await getContainerRuntimeClient();
+    const since = opts?.since !== undefined ? toUnixSeconds(opts.since) : undefined;
 
-    return client.container.logs(this.container, opts);
+    return client.container.logs(this.container, { ...opts, since });
   }
 
   async [Symbol.asyncDispose]() {
diff --git a/packages/testcontainers/src/test-container.ts b/packages/testcontainers/src/test-container.ts
index 51a1b0345..1ef80602e 100644
--- a/packages/testcontainers/src/test-container.ts
+++ b/packages/testcontainers/src/test-container.ts
@@ -34,6 +34,7 @@ export interface TestContainer {
   withExposedPorts(...ports: PortWithOptionalBinding[]): this;
   withBindMounts(bindMounts: BindMount[]): this;
   withWaitStrategy(waitStrategy: WaitStrategy): this;
+  /** Container startup timeout in milliseconds. */
   withStartupTimeout(startupTimeoutMs: number): this;
   withNetwork(network: StartedNetwork): this;
   withNetworkMode(networkMode: string): this;
@@ -52,17 +53,21 @@ export interface TestContainer {
   withCopyArchivesToContainer(archivesToCopy: ArchiveToCopy[]): this;
   withCopyToContainerOptions(copyToContainerOptions: CopyToContainerOptions): this;
   withWorkingDir(workingDir: string): this;
+  /** Resource limits. `memory` is gigabytes; `cpu` is CPUs. */
   withResourcesQuota(resourcesQuota: ResourcesQuota): this;
+  /** `/dev/shm` size in bytes. */
   withSharedMemorySize(bytes: number): this;
   withLogConsumer(logConsumer: (stream: Readable) => unknown): this;
   withHostname(hostname: string): this;
 }
 
 export interface RestartOptions {
+  /** Stop timeout before restart, in milliseconds. */
   timeout: number;
 }
 
 export interface StopOptions {
+  /** Stop timeout in milliseconds. */
   timeout: number;
   remove: boolean;
   removeVolumes: boolean;
@@ -89,7 +94,12 @@ export interface StartedTestContainer extends AsyncDisposable {
   copyFilesToContainer(filesToCopy: FileToCopy[]): Promise<void>;
   copyContentToContainer(contentsToCopy: ContentToCopy[]): Promise<void>;
   exec(command: string | string[], opts?: Partial<ExecOptions>): Promise<ExecResult>;
-  logs(opts?: { since?: number; tail?: number }): Promise<Readable>;
+  /**
+   * Stream container logs.
+   * @param opts.since Unix timestamp in **seconds**, or a `Date` (converted to seconds). Millisecond values such as `Date.now()` are far in the future for Docker.
+   * @param opts.tail Number of lines from the end of the logs, or omit for the full stream.
+   */
+  logs(opts?: { since?: number | Date; tail?: number }): Promise<Readable>;
 }
 
 export interface StoppedTestContainer {
diff --git a/packages/testcontainers/src/types.ts b/packages/testcontainers/src/types.ts
index 28242ebf1..99ae3080e 100644
--- a/packages/testcontainers/src/types.ts
+++ b/packages/testcontainers/src/types.ts
@@ -63,15 +63,21 @@ export type TmpFs = { [dir in string]: string };
 export type Ulimits = { [name: string]: { hard: number | undefined; soft: number | undefined } };
 
 export type ResourcesQuota = {
-  memory?: number; // Memory limit in Gigabytes
-  cpu?: number; // CPU quota in units of CPUs
+  /** Memory limit in gigabytes (e.g. `0.5` is 512 MiB). */
+  memory?: number;
+  /** CPU quota in CPUs (e.g. `1` is one CPU). */
+  cpu?: number;
 };
 
 export type HealthCheck = {
   test: ["CMD-SHELL", string] | ["CMD", ...string[]];
+  /** Interval between checks, in milliseconds. */
   interval?: number;
+  /** Maximum time to allow one check to run, in milliseconds. */
   timeout?: number;
+  /** Consecutive failures before the container is marked unhealthy. */
   retries?: number;
+  /** Grace period before failed checks count, in milliseconds. */
   startPeriod?: number;
 };
 
diff --git a/packages/testcontainers/src/wait-strategies/composite-wait-strategy.ts b/packages/testcontainers/src/wait-strategies/composite-wait-strategy.ts
index c673607bb..c06d34f94 100644
--- a/packages/testcontainers/src/wait-strategies/composite-wait-strategy.ts
+++ b/packages/testcontainers/src/wait-strategies/composite-wait-strategy.ts
@@ -48,6 +48,7 @@ export class CompositeWaitStrategy extends AbstractWaitStrategy {
     return this;
   }
 
+  /** Overall deadline for all composed strategies, in milliseconds. */
   public withDeadline(deadline: number): this {
     this.deadline = deadline;
     return this;
diff --git a/packages/testcontainers/src/wait-strategies/http-wait-strategy.ts b/packages/testcontainers/src/wait-strategies/http-wait-strategy.ts
index d0a8e5332..e883c8917 100644
--- a/packages/testcontainers/src/wait-strategies/http-wait-strategy.ts
+++ b/packages/testcontainers/src/wait-strategies/http-wait-strategy.ts
@@ -58,6 +58,7 @@ export class HttpWaitStrategy extends AbstractWaitStrategy {
     return this;
   }
 
+  /** HTTP read timeout in milliseconds. */
   public withReadTimeout(readTimeoutMs: number): this {
     this.readTimeoutMs = readTimeoutMs;
     return this;
diff --git a/packages/testcontainers/src/wait-strategies/wait-strategy.ts b/packages/testcontainers/src/wait-strategies/wait-strategy.ts
index a93d8c482..2bd0b3059 100644
--- a/packages/testcontainers/src/wait-strategies/wait-strategy.ts
+++ b/packages/testcontainers/src/wait-strategies/wait-strategy.ts
@@ -4,6 +4,7 @@ import type { BoundPorts } from "../utils/bound-ports";
 export interface WaitStrategy {
   waitUntilReady(container: Dockerode.Container, boundPorts: BoundPorts, startTime?: Date): Promise<void>;
 
+  /** Wait-strategy timeout in milliseconds. */
   withStartupTimeout(startupTimeoutMs: number): WaitStrategy;
 
   isStartupTimeoutSet(): boolean;
@@ -21,6 +22,7 @@ export abstract class AbstractWaitStrategy implements WaitStrategy {
     startTime?: Date
   ): Promise<void>;
 
+  /** Wait-strategy timeout in milliseconds. */
   public withStartupTimeout(startupTimeoutMs: number): this {
     this.startupTimeoutMs = startupTimeoutMs;
     this.startupTimeoutSet = true;