diff --git a/src/main/java/bdledger/api/Client.java b/src/main/java/bdledger/api/Client.java
index db2c90f..efa43a8 100644
--- a/src/main/java/bdledger/api/Client.java
+++ b/src/main/java/bdledger/api/Client.java
@@ -12,6 +12,7 @@ import io.grpc.ManagedChannel;
 import io.grpc.ManagedChannelBuilder;
 import io.grpc.StatusRuntimeException;
 
+import java.time.ZonedDateTime;
 import java.util.concurrent.TimeUnit;
 import java.util.logging.Level;
 import java.util.logging.Logger;
@@ -225,7 +226,7 @@ public class Client {
 
   /**
    * <a
-   * href="#">返回哈希所指定区块的信息</a>
+   * href="#">返回哈希所指定的区块</a>
    * （非阻塞）
    */
   public ListenableFuture<GetBlockByHashResponse> getBlockByHash(
@@ -245,7 +246,7 @@ public class Client {
 
   /**
    * <a
-   * href="#">返回哈希所指定区块的信息</a>
+   * href="#">返回哈希所指定的区块</a>
    * （阻塞）
    */
   public GetBlockByHashResponse getBlockByHashSync(String ledger, String hash, boolean fullTransactions) {
@@ -276,7 +277,99 @@ public class Client {
 
   /**
    * <a
-   * href="#">返回符合条件的区块的数量</a>
+   * href="#">返回时间范围内的区块</a>
+   * （非阻塞）
+   */
+  public ListenableFuture<GetBlocksResponse> getBlocks(String ledger, ZonedDateTime startDateTime) {
+    return getBlocks(ledger, startDateTime.toEpochSecond());
+  }
+
+  /**
+   * <a
+   * href="#">返回时间范围内的区块</a>
+   * （非阻塞）
+   */
+  public ListenableFuture<GetBlocksResponse> getBlocks(String ledger, ZonedDateTime startDateTime, ZonedDateTime endDateTime) {
+    return getBlocks(ledger, startDateTime.toEpochSecond(), endDateTime.toEpochSecond());
+  }
+
+  /**
+   * <a
+   * href="#">返回时间范围内的区块</a>
+   * （阻塞）
+   */
+  public GetBlocksResponse getBlocksSync(String ledger, ZonedDateTime startDateTime) {
+    return getBlocksSync(ledger, startDateTime.toEpochSecond());
+  }
+
+  /**
+   * <a
+   * href="#">返回时间范围内的区块</a>
+   * （阻塞）
+   */
+  public GetBlocksResponse getBlocksSync(String ledger, ZonedDateTime startDateTime, ZonedDateTime endDateTime) {
+    return getBlocksSync(ledger, startDateTime.toEpochSecond(), endDateTime.toEpochSecond());
+  }
+
+  /**
+   * <a
+   * href="#">返回时间范围内的区块</a>
+   * （非阻塞）
+   */
+  public ListenableFuture<GetBlocksResponse> getBlocks(String ledger, long startUnixTime) {
+    return getBlocks(ledger, startUnixTime, -1);
+  }
+
+  /**
+   * <a
+   * href="#">返回时间范围内的区块</a>
+   * （非阻塞）
+   */
+  public ListenableFuture<GetBlocksResponse> getBlocks(String ledger, long startUnixTime, long endUnixTime) {
+
+    info(
+        "*** getBlock: ledger={0} startUnixTime={1} endUnixTime={2}",
+        ledger, startUnixTime, endUnixTime);
+
+    try {
+      return queryFutureStub.getBlocks(getBlocksRequest(ledger, startUnixTime, endUnixTime));
+    } catch (StatusRuntimeException e) {
+      warning("RPC failed: {0}", e.getStatus());
+      return null;
+    }
+  }
+
+  /**
+   * <a
+   * href="#">返回时间范围内的区块</a>
+   * （阻塞）
+   */
+  public GetBlocksResponse getBlocksSync(String ledger, long startUnixTime) {
+    return getBlocksSync(ledger, startUnixTime, -1);
+  }
+
+  /**
+   * <a
+   * href="#">返回时间范围内的区块</a>
+   * （阻塞）
+   */
+  public GetBlocksResponse getBlocksSync(String ledger, long startUnixTime, long endUnixTime) {
+
+    info(
+        "*** getBlockSync: ledger={0} startUnixTime={1} endUnixTime={2}",
+        ledger, startUnixTime, endUnixTime);
+
+    try {
+      return queryBlockingStub.getBlocks(getBlocksRequest(ledger, startUnixTime, endUnixTime));
+    } catch (StatusRuntimeException e) {
+      warning("RPC failed: {0}", e.getStatus());
+      return null;
+    }
+  }
+
+  /**
+   * <a
+   * href="#">返回账本中的区块数量</a>
    * （非阻塞）
    */
   public ListenableFuture<CountBlocksResponse> countBlocks(String ledger) {
@@ -284,7 +377,7 @@ public class Client {
     info("*** blockNumber: ledger={0}", ledger);
 
     try {
-      return queryFutureStub.countBlocks(blocksRequest(ledger));
+      return queryFutureStub.countBlocks(getBlocksRequest(ledger, -1, -1));
     } catch (StatusRuntimeException e) {
       warning("RPC failed: {0}", e.getStatus());
       return null;
@@ -293,7 +386,7 @@ public class Client {
 
   /**
    * <a
-   * href="#">返回符合条件的区块的数量</a>
+   * href="#">返回账本中的区块数量</a>
    * （阻塞）
    */
   public CountBlocksResponse countBlocksSync(String ledger) {
@@ -301,20 +394,30 @@ public class Client {
     info("*** blockNumberSync: ledger={0}", ledger);
 
     try {
-      return queryBlockingStub.countBlocks(blocksRequest(ledger));
+      return queryBlockingStub.countBlocks(getBlocksRequest(ledger, -1, -1));
     } catch (StatusRuntimeException e) {
       warning("RPC failed: {0}", e.getStatus());
       return null;
     }
   }
 
-  private BlocksRequest blocksRequest(String ledger) {
-    return BlocksRequest.newBuilder().setLedger(ledger).build();
+  private BlocksRequest getBlocksRequest(String ledger, long startTimestamp, long endTimestamp) {
+
+    BlocksRequest.Builder reqBuilder =
+        BlocksRequest.newBuilder().setLedger(ledger);
+    if (startTimestamp != -1) {
+      reqBuilder.setStartTimestamp(startTimestamp);
+    }
+    if (endTimestamp != -1) {
+      reqBuilder.setEndTimestamp(endTimestamp);
+    }
+
+    return reqBuilder.build();
   }
 
   /**
    * <a
-   * href="#">返回哈希所指定事务的信息</a>
+   * href="#">返回哈希所指定的事务</a>
    * （非阻塞）
    */
   public ListenableFuture<GetTransactionByHashResponse> getTransactionByHash(String ledger, String hash) {
@@ -331,7 +434,7 @@ public class Client {
 
   /**
    * <a
-   * href="#">返回哈希所指定事务的信息</a>
+   * href="#">返回哈希所指定的事务</a>
    * （阻塞）
    */
   public GetTransactionByHashResponse getTransactionByHashSync(String ledger, String hash) {
@@ -359,7 +462,7 @@ public class Client {
 
   /**
    * <a
-   * href="#">返回区块的哈希与事务的index所指定事务的信息</a>
+   * href="#">返回区块的哈希与事务的index所指定的事务</a>
    * （非阻塞）
    */
   public ListenableFuture<GetTransactionByBlockHashAndIndexResponse> getTransactionByBlockHashAndIndex(
@@ -380,7 +483,7 @@ public class Client {
 
   /**
    * <a
-   * href="#">返回区块的哈希与事务的index所指定事务的信息</a>
+   * href="#">返回区块的哈希与事务的index所指定的事务</a>
    * （阻塞）
    */
   public GetTransactionByBlockHashAndIndexResponse getTransactionByBlockHashAndIndexSync(
@@ -414,7 +517,7 @@ public class Client {
 
   /**
    * <a
-   * href="#">返回符合条件的数量</a>
+   * href="#">返回账本中的事务数量</a>
    * （非阻塞）
    */
   public ListenableFuture<CountTransactionsResponse> countTransactions(String ledger) {
@@ -431,7 +534,7 @@ public class Client {
 
   /**
    * <a
-   * href="#">返回符合条件的事务的数量</a>
+   * href="#">返回账本中的事务数量</a>
    * （阻塞）
    */
   public CountTransactionsResponse countTransactionsSync(String ledger) {
diff --git a/src/test/java/bdledger/api/ClientTests.java b/src/test/java/bdledger/api/ClientTests.java
index f93f1ad..28902fb 100644
--- a/src/test/java/bdledger/api/ClientTests.java
+++ b/src/test/java/bdledger/api/ClientTests.java
@@ -2,8 +2,8 @@ package bdledger.api;
 
 import bdledger.api.grpc.common.Block;
 import bdledger.api.grpc.common.Transaction;
-import bdledger.api.grpc.ledger.GetLedgersResponse;
 import bdledger.api.grpc.common.TransactionType;
+import bdledger.api.grpc.ledger.GetLedgersResponse;
 import com.google.protobuf.ByteString;
 import io.grpc.Status;
 import org.junit.jupiter.api.AfterAll;
@@ -23,7 +23,6 @@ import static org.junit.jupiter.api.Assertions.*;
 class ClientTests {
 
   private static final String ledger = "test";
-  private static final String[] ledgers = new String[]{"first", "second", "third"};
   private static final int blockCount = 2018;
   private static final int transactionCount = 2020;
 
@@ -132,7 +131,7 @@ class ClientTests {
     assertEquals(3, r.getLedgersCount());
     String[] expected = new String[]{"first", "second", "third"};
     assertAll(
-        IntStream.range(0, 3).boxed().map(i -> () -> assertEquals(ledgers[i], r.getLedgers(i))));
+        IntStream.range(0, 3).boxed().map(i -> () -> assertEquals(expected[i], r.getLedgers(i))));
   }
 
   @Test
@@ -175,6 +174,29 @@ class ClientTests {
     assertEquals(block, b);
   }
 
+  // TODO
+  @Test
+  @DisplayName("getBlocks#1")
+  void getBlocks1() throws ExecutionException, InterruptedException {
+    client.getBlocks(ledger, 0).get();
+  }
+
+  // TODO
+  @Test
+  @DisplayName("getBlocks#2")
+  void getBlocks2() throws ExecutionException, InterruptedException {
+    client.getBlocks(ledger, 0, 0).get();
+  }
+
+  @Test
+  @DisplayName("getBlocks#3")
+  void getBlocks3() {
+    Throwable e = assertThrows(Exception.class, () -> client.getBlocks("", 0, 0).get());
+    Status s = Status.fromThrowable(e);
+    assertEquals(Status.Code.INVALID_ARGUMENT, s.getCode());
+    assertEquals("ledger must not be empty", s.getDescription());
+  }
+
   @Test
   @DisplayName("CountBlocks#1")
   void blockNumber1() throws ExecutionException, InterruptedException {
@@ -204,6 +226,7 @@ class ClientTests {
     assertEquals(tx, t);
   }
 
+  @Test
   @DisplayName("CountTransactions#1")
   void CountTransactions1() throws ExecutionException, InterruptedException {
     assertEquals(transactionCount, client.countTransactions(ledger).get().getCount());