diff --git a/hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/InformixDialect.java b/hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/InformixDialect.java
index b269c9206b..d31b169b93 100644
--- a/hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/InformixDialect.java
+++ b/hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/InformixDialect.java
@@ -7,6 +7,9 @@
 package org.hibernate.community.dialect;
 
 import java.sql.Types;
+import java.time.temporal.TemporalAccessor;
+import java.util.Date;
+import java.util.TimeZone;
 
 import org.hibernate.boot.Metadata;
 import org.hibernate.boot.model.FunctionContributions;
@@ -74,6 +77,8 @@ import org.hibernate.type.descriptor.sql.internal.CapacityDependentDdlType;
 import org.hibernate.type.descriptor.sql.spi.DdlTypeRegistry;
 import org.hibernate.type.spi.TypeConfiguration;
 
+import jakarta.persistence.TemporalType;
+
 import static org.hibernate.exception.spi.TemplatedViolatedConstraintNameExtractor.extractUsingTemplate;
 import static org.hibernate.type.SqlTypes.BIGINT;
 import static org.hibernate.type.SqlTypes.BINARY;
@@ -88,6 +93,14 @@ import static org.hibernate.type.SqlTypes.TIMESTAMP_WITH_TIMEZONE;
 import static org.hibernate.type.SqlTypes.TINYINT;
 import static org.hibernate.type.SqlTypes.VARBINARY;
 import static org.hibernate.type.SqlTypes.VARCHAR;
+import static org.hibernate.type.descriptor.DateTimeUtils.JDBC_ESCAPE_END;
+import static org.hibernate.type.descriptor.DateTimeUtils.JDBC_ESCAPE_START_DATE;
+import static org.hibernate.type.descriptor.DateTimeUtils.JDBC_ESCAPE_START_TIME;
+import static org.hibernate.type.descriptor.DateTimeUtils.JDBC_ESCAPE_START_TIMESTAMP;
+import static org.hibernate.type.descriptor.DateTimeUtils.appendAsDate;
+import static org.hibernate.type.descriptor.DateTimeUtils.appendAsLocalTime;
+import static org.hibernate.type.descriptor.DateTimeUtils.appendAsTime;
+import static org.hibernate.type.descriptor.DateTimeUtils.appendAsTimestampWithMicros;
 
 /**
  * Dialect for Informix 7.31.UD3 with Informix
@@ -234,6 +247,11 @@ public class InformixDialect extends Dialect {
 		return 5;
 	}
 
+	@Override
+	public boolean doesRoundTemporalOnOverflow() {
+		return false;
+	}
+
 	@Override
 	public int getFloatPrecision() {
 		return 8;
@@ -713,6 +731,56 @@ public class InformixDialect extends Dialect {
 				.replace("S", "%F1");
 	}
 
+	@Override
+	public void appendDateTimeLiteral(
+			SqlAppender appender,
+			TemporalAccessor temporalAccessor,
+			TemporalType precision,
+			TimeZone jdbcTimeZone) {
+		switch ( precision ) {
+			case DATE:
+				appender.appendSql( JDBC_ESCAPE_START_DATE );
+				appendAsDate( appender, temporalAccessor );
+				appender.appendSql( JDBC_ESCAPE_END );
+				break;
+			case TIME:
+				appender.appendSql( JDBC_ESCAPE_START_TIME );
+				appendAsTime( appender, temporalAccessor, supportsTemporalLiteralOffset(), jdbcTimeZone );
+				appender.appendSql( JDBC_ESCAPE_END );
+				break;
+			case TIMESTAMP:
+				appender.appendSql( JDBC_ESCAPE_START_TIMESTAMP );
+				appendAsTimestampWithMicros( appender, temporalAccessor, supportsTemporalLiteralOffset(), jdbcTimeZone );
+				appender.appendSql( JDBC_ESCAPE_END );
+				break;
+			default:
+				throw new IllegalArgumentException();
+		}
+	}
+
+	@Override
+	public void appendDateTimeLiteral(SqlAppender appender, Date date, TemporalType precision, TimeZone jdbcTimeZone) {
+		switch ( precision ) {
+			case DATE:
+				appender.appendSql( JDBC_ESCAPE_START_DATE );
+				appendAsDate( appender, date );
+				appender.appendSql( JDBC_ESCAPE_END );
+				break;
+			case TIME:
+				appender.appendSql( JDBC_ESCAPE_START_TIME );
+				appendAsLocalTime( appender, date );
+				appender.appendSql( JDBC_ESCAPE_END );
+				break;
+			case TIMESTAMP:
+				appender.appendSql( JDBC_ESCAPE_START_TIMESTAMP );
+				appendAsTimestampWithMicros( appender, date, jdbcTimeZone );
+				appender.appendSql( JDBC_ESCAPE_END );
+				break;
+			default:
+				throw new IllegalArgumentException();
+		}
+	}
+
 	@Override
 	public String getSelectClauseNullString(int sqlType, TypeConfiguration typeConfiguration) {
 		DdlType descriptor = typeConfiguration.getDdlTypeRegistry().getDescriptor( sqlType );
diff --git a/hibernate-core/src/test/java/org/hibernate/orm/test/temporal/FractionalSecondsTests.java b/hibernate-core/src/test/java/org/hibernate/orm/test/temporal/FractionalSecondsTests.java
index 7fe9ae3ff9..3bb0bd086e 100644
--- a/hibernate-core/src/test/java/org/hibernate/orm/test/temporal/FractionalSecondsTests.java
+++ b/hibernate-core/src/test/java/org/hibernate/orm/test/temporal/FractionalSecondsTests.java
@@ -16,6 +16,7 @@ import java.time.ZonedDateTime;
 import org.hibernate.annotations.FractionalSeconds;
 import org.hibernate.boot.spi.MetadataImplementor;
 import org.hibernate.community.dialect.AltibaseDialect;
+import org.hibernate.community.dialect.InformixDialect;
 import org.hibernate.dialect.CockroachDialect;
 import org.hibernate.dialect.DerbyDialect;
 import org.hibernate.dialect.Dialect;
@@ -121,6 +122,7 @@ public class FractionalSecondsTests {
 	@SkipForDialect(dialectClass = HANADialect.class, reason = "HANA does not support specifying a precision on timestamps")
 	@SkipForDialect(dialectClass = SybaseDialect.class, reason = "Because... Sybase...", matchSubTypes = true)
 	@SkipForDialect(dialectClass = AltibaseDialect.class, reason = "Altibase does not support specifying a precision on timestamps")
+	@SkipForDialect(dialectClass = InformixDialect.class, reason = "Informix only supports precision from 1 to 5")
 	void testUsage0(SessionFactoryScope scope) {
 		final Instant start = Instant.now();
 
@@ -172,6 +174,7 @@ public class FractionalSecondsTests {
 	@SkipForDialect(dialectClass = PostgreSQLDialect.class, reason = "PostgreSQL only supports precision <= 6", matchSubTypes = true)
 	@SkipForDialect(dialectClass = CockroachDialect.class, reason = "CockroachDB only supports precision <= 6")
 	@SkipForDialect(dialectClass = HANADialect.class, reason = "HANA does not support specifying a precision on timestamps")
+	@SkipForDialect(dialectClass = InformixDialect.class, reason = "Informix only supports precision from 1 to 5")
 	void testUsage9(SessionFactoryScope scope) {
 		final Instant start = Instant.now();
 
diff --git a/hibernate-core/src/test/java/org/hibernate/orm/test/temporal/JavaTimeFractionalSecondsTests.java b/hibernate-core/src/test/java/org/hibernate/orm/test/temporal/JavaTimeFractionalSecondsTests.java
index b84fbda1ea..0e40a61fc1 100644
--- a/hibernate-core/src/test/java/org/hibernate/orm/test/temporal/JavaTimeFractionalSecondsTests.java
+++ b/hibernate-core/src/test/java/org/hibernate/orm/test/temporal/JavaTimeFractionalSecondsTests.java
@@ -17,6 +17,7 @@ import org.hibernate.annotations.FractionalSeconds;
 import org.hibernate.annotations.JdbcTypeCode;
 import org.hibernate.boot.spi.MetadataImplementor;
 import org.hibernate.community.dialect.AltibaseDialect;
+import org.hibernate.community.dialect.InformixDialect;
 import org.hibernate.dialect.CockroachDialect;
 import org.hibernate.dialect.DerbyDialect;
 import org.hibernate.dialect.Dialect;
@@ -123,6 +124,7 @@ public class JavaTimeFractionalSecondsTests {
 	@SkipForDialect(dialectClass = HANADialect.class, reason = "HANA does not support specifying a precision on timestamps")
 	@SkipForDialect(dialectClass = SybaseDialect.class, reason = "Because... Sybase...", matchSubTypes = true)
 	@SkipForDialect(dialectClass = AltibaseDialect.class, reason = "Altibase does not support specifying a precision on timestamps")
+	@SkipForDialect(dialectClass = InformixDialect.class, reason = "Informix only supports precision from 1 to 5")
 	void testUsage0(SessionFactoryScope scope) {
 		final Instant start = Instant.now();
 
@@ -174,6 +176,7 @@ public class JavaTimeFractionalSecondsTests {
 	@SkipForDialect(dialectClass = PostgreSQLDialect.class, reason = "PostgreSQL only supports precision <= 6", matchSubTypes = true)
 	@SkipForDialect(dialectClass = CockroachDialect.class, reason = "CockroachDB only supports precision <= 6")
 	@SkipForDialect(dialectClass = HANADialect.class, reason = "HANA does not support specifying a precision on timestamps")
+	@SkipForDialect(dialectClass = InformixDialect.class, reason = "Informix only supports precision from 1 to 5")
 	void testUsage9(SessionFactoryScope scope) {
 		final Instant start = Instant.now();